Abstract: A bridge circuit includes a high-side transistor connected between a power supply terminal and an output terminal, and a low-side transistor connected between the output terminal and a ground terminal. A high-side pre-driver and a low-side pre-driver drive the high-side transistor and the low-side transistor. A first transistor is connected between the output terminal and the ground terminal in a manner to form the regenerative path parallel to the low-side transistor. In a regenerative state in which a current sinks from the output terminal, a regenerative control circuit controls the voltage of a control terminal of the first transistor in a manner that an output voltage of the output terminal approaches a target voltage higher than the power supply voltage of the power supply terminal by a first voltage width.

Abstract: Disclosed are an inverter control device and method. The method according to an embodiment of the present includes estimating a rotation speed of a motor, determining a slip frequency reference using an energy of a direct current terminal capacitor of an inverter, which provides an output voltage to the motor, and a direct current terminal energy reference when a direct current terminal voltage of the inverter is a certain level or less, and providing a frequency reference determined by adding the rotation speed of the motor and the slip frequency reference to the inverter.

Abstract: A method for controlling a multi-phase rotary electric machine is disclosed. The stator of the machine is controlled by a control bridge having a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected at a center tap connected to a phase of said rotary electric machine. The machine operates as a generator and is connected to an electrical network on board a motor vehicle. The method involves short-circuiting a phase winding of the stator when a measurement of the voltage of said network exceeds a first predetermined value, and after this, activating a switching arm, the center tap of which is connected to said at least one short-circuited phase winding, during which the intensity in the short-circuited winding is measured, if the measured intensity is positive, the high-side switch of said activated switching arm is moved to the closed position, otherwise, it is moved to the open position.

Abstract: A computing device implemented method includes receiving one or more signals that represent an angular speed of a permanent magnet electric motor of a hybrid electric vehicle, the one or more signals being provided by an angular sensor connected to the electric motor, receiving a signal representing a voltage from the electric motor, the voltage being a direct axis voltage component of a three-phase motor model, determining if the angular speed is within a predetermined threshold, calculating an error angle representing a correction factor for an alignment of the electric motor based on a ratio of the voltage and the angular speed, storing the correction factor, and determining a binary indication of a status of error angle, and repeating the steps until the binary indication is positive.

Abstract: A motor driving device includes an inverter to supply an alternating current, a switch unit that switches the number of at least one permanent magnet synchronous motor to which the alternating current is supplied from the inverter, a detector to detect a detection value corresponding to the alternating current supplied to the at least one permanent magnet synchronous motor, and a control device to control the inverter and the switch unit. The control device sets an overcurrent interruption threshold value at a value based on the number. When the detection value is greater than or equal to the overcurrent interruption threshold value, the control device makes the inverter stop the supplying of the alternating current to the at least one permanent magnet synchronous motor.

Abstract: In a motor drive device 120, a phase compensation amount calculation unit 110 calculates a phase compensation amount ?? for compensating a voltage phase ?v* when a control mode is switched in a control selection unit 90. The control selection unit 90 outputs the three-phase voltage command Vuvw* according to any one of the plurality of control modes based on the modulation factor Kh*, the voltage phase ?v*, and the phase compensation amount ??. A PWM control unit 100 outputs gate signals Gun, Gup, Gvn, Gvp, Gwn, and Gwv based on the three-phase voltage command Vuvw* and a rotor position ?d. The inverter 20 has a plurality of switching elements, and controls the plurality of switching elements based on gate signals Gun, Gup, Gvn, Gyp, Gwn, and Gwv to drive the AC motor 10.

Abstract: A method for controlling an inverter configured to power electrically a motor including a stator and a rotor capable of being rotated relative to the stator when the motor is electrically powered, the inverter including a plurality of switches suitable for being controlled to open/close in order to regulate the power supply of the motor, each switch having a predetermined transition time from a closed state to an open state, and a predetermined transition time from the open state to the closed state, wherein the method includes the step of not generating the command to open and close the switches when this violates the predetermined transition times from a closed state to an open state, and the predetermined transition times from the open state to the closed state.

Abstract: An industrial control system may receive processing information from at least two control systems associated with at least two components within an industrial automation system. The processing information may include a processing load value for each of the at least two control systems. The industrial control system may then distribute processing loads associated with the at least two control systems when a total processing load between the at least two control systems is unbalanced.

Abstract: A computing device implemented method includes receiving one or more signals that represent an angular speed of a permanent magnet electric motor of a hybrid electric vehicle, the one or more signals being provided by an angular sensor connected to the electric motor, receiving a signal representing a voltage from the electric motor, the voltage being a direct axis voltage component of a three-phase motor model, determining if the angular speed is within a predetermined threshold, calculating an error angle representing a correction factor for an alignment of the electric motor based on a ratio of the voltage and the angular speed, storing the correction factor, and determining a binary indication of a status of error angle, and repeating the steps until the binary indication is positive.

Abstract: Provided is a drive source control device that can suppress increase in the rotation speed of a drive source. This drive source control device (67) includes: an overspeed determination module (68) to determine whether the rotation speed of each of two drive sources (2L, 2R) is overspeed; and a correction module (69) to, when the overspeed determination module (68) determines that the rotation speed of at least one of the drive sources is overspeed, correct command values for outputs of the two drive sources, supplied from a command module (66a). The correction module (69) corrects the command values of the outputs of the two drive sources (2L, 2R) so that the torque of the drive wheel having greater rotation speed decreases from the torque before the correction, and the torque of the drive wheel having smaller rotation speed maintains or decreases from the torque before the correction.

Abstract: A method for determining the state of a brushless motor having first, second and third phases, in some embodiments, comprises: decoupling said motor from a power source; determining whether said motor is rotating or non-rotating; if the motor is rotating, determining a first phase voltage state relative to a common voltage and a second phase voltage state relative to the common voltage, said first phase and second phase voltage states determined when a third phase voltage is within a predetermined range of said common voltage; and if the first phase voltage state and the second phase voltage state are the same, repeating said determination as to whether the motor is rotating or non-rotating.

Abstract: To surely detect a back electromotive force generated in a non-conduction phase at an extremely low duty ratio, a motor driving system includes a three-phase motor, an inverter circuit, and a semiconductor device. A controller included in the semiconductor device compares a voltage at an output node corresponding to a non-conduction phase of the inverter circuit and a reference voltage with each other, thereby estimating a position of a rotor of the three-phase motor and generating a pulse width modulation signal based on the estimated position of the rotor. The controller detects the voltage at the output node of the non-conduction phase in a regeneration period of the pulse width modulation signal when a duty ratio of the pulse width modulation signal is less than a threshold value, the regeneration period being a period in which current is made to flow to the three-phase motor on a regeneration path.

Abstract: A component control system includes a component. At least one component element is included in the component. A component controller is included in the component, coupled to the at least one component element, and operable to couple to an Information Handling System (IHS) controller. The component controller is operable to receive a normalized component performance (NCP) value from the IHS controller. The NCP value is associated with at least one component output range. The component controller is also operable to provide a control signal that is associated with the NCP value to the at least one component element. In response to receiving the control signal, the at least one component element operates such that the component produces at least one component output, and each component output produced by the component is within a corresponding component output range.

Abstract: A powertrain for a vehicle includes a Y-wound generator and Y-wound motor coupled via respective neutral terminals, a generator inverter coupled between the Y-wound generator and a generator bus, and a motor inverter coupled between the Y-wound motor and a motor bus. The powertrain further includes a traction battery having first and second terminals each selectively coupled to the neutral terminals. The second terminal is further coupled to bus terminals of the generator and motor bus.

Abstract: According to an aspect of the present disclosure, a motor drive control device includes a motor drive unit having a plurality of switch elements connected to a power supply source and supplying a driving current to a plurality of phase coils of a motor, a control circuit unit outputting, to the motor drive unit, a drive control signal for operating the plurality of switch elements to sequentially switch energization patterns for the plurality of phase coils, and a current detecting circuit for detecting a voltage value corresponding to a magnitude of the driving current, wherein the control circuit unit includes a first determination unit determining whether a state of overcurrent where a magnitude of the driving current exceeds a predetermined overcurrent threshold occurs based on the voltage value each time an energization pattern is switched, and a second determination unit determining whether driving of the motor is in an abnormal condition based on a determination result of the first determination unit f

Abstract: A method for operating an electrical machine, wherein an inverter of the electrical machine is actuated by a pulse width modulation. In one case, it is provided that a pulse duty factor for the pulse width modulation is determined from a voltage value (d) that is dependent on the desired rotational speed as well as a time-dependent angle value (?). Embodiments of the invention further relate to an electrical machine.

Abstract: The present invention provides a control device and a control method for a brushless motor, including energization modes for selecting a phase to be energized by pulse width modulation operation from among phases of the brushless motor, and being provided for controlling the rotation speed of the brushless motor by switching between the energization modes based on comparison of a voltage induced in a non-energized phase with its threshold value. In the control device and method, the input voltage of the brushless motor is increased when the duration for which the induced voltage is maintained unchanged or the duration for which the current energization mode is maintained employed reaches a predetermined time. This prevents the brushless motor from being staying in the stopped state, even when the load on the brushless motor abruptly increases while the brushless motor rotates at a speed within an extremely low speed range.

Abstract: A circuit for detecting loss of phase in three-phase power systems. The circuit includes a current sensor and a microprocessor. The current sensors are coupled to respective phases of a three-phase power source configured to supply power to a load. The microprocessor is coupled to the current sensors to process current measurements and detect loss of phase in the three-phase power source.

Abstract: A motor driving device comprises a first arithmetic section calculating a rotational speed and a magnetic pole electrical angle of a motor rotor, a current command setting section setting a d-axis current command and a q-axis current command in a rotating coordinate dq system based on a difference between the rotational speed and a target rotational speed, a driving command generating section generating a sinusoidal wave driving command based on the d-axis current command, the q-axis current command, the rotational speed and the magnetic pole electrical angle and a PWM signal generating section. When the rotational speed has a positive value indicating a positive rotational state, the current command setting section sets the q-axis current command of acceleration driving, and when the rotational speed has a negative value indicating a reverse rotational state, the current command setting section sets the q-axis current command of deceleration driving.

Abstract: There are provided a motor control apparatus, an electric power steering apparatus, and a vehicle, capable of controlling the driving of an electric motor accurately even when a failure occurs in a motor electric angle detecting unit that detects a motor electric angle.

Abstract: A method according to an exemplary aspect of the present disclosure includes, among other things, monitoring a root mean square (RMS) current of a component for a time window, and adjusting a flow of current relative to a battery such that a slope of the RMS current gradually approaches zero as the RMS current approaches an RMS current limit for the time window.

Abstract: A computing device implemented method includes receiving one or more signals that represent an angular speed of a permanent magnet electric motor of a hybrid electric vehicle, the one or more signals being provided by an angular sensor connected to the electric motor, receiving a signal representing a voltage from the electric motor, the voltage being a direct axis voltage component of a three-phase motor model, determining if the angular speed is within a predetermined threshold, calculating an error angle representing a correction factor for an alignment of the electric motor based on a ratio of the voltage and the angular speed, storing the correction factor, and determining a binary indication of a status of error angle, and repeating the steps until the binary indication is positive.

Abstract: An object of the invention is to improve precision of current detection in a switching system having plural switching circuits. A first PWM timing generation circuit generates an edge timing of a PWM signal by using a comparison value and a count value and drives a first switching circuit. A second PWM timing generation circuit generates an edge timing of a PWM signal of plural phases by using a comparison value and a count value and drives a second switching circuit. One of the switching circuits is an inverter circuit of a common shunt type in which a shunt resistor is provided commonly for plural phases. One of the PWM timing generation circuits shifts the generated edge timing so that an interval between an edge timing of one of the circuits and an AD conversion timing of the other becomes equal to or larger than a predetermined reference value.

Abstract: A synchronous rectifier circuit can include: a full-bridge rectifier circuit having first, second, third, and fourth switches, where a common node of the first and fourth switches is configured as a first input terminal of the synchronous rectifier circuit, and a common node of the second and third switches is configured as a second input terminal of the synchronous rectifier circuit; a switching control circuit configured to generate a first control signal to control the first and third switches, and a second control signal to control the second and fourth switches; and the switching control circuit being configured to self-adjust the first and second control signals to control operating points of the first, second, third, and fourth switches to be approximately ideal operating points.

Abstract: Disclosed herein is a method for controlling an inverter. The method includes calculating a maximum current from an output current of each phase of the inverter; determining a variable level upper limit by performing a DQ conversion for the output current of each phase of the inverter and adding a change allowable value to the DQ converted output current; determining a difference between the maximum current for each phase and the variable level upper limit as an output frequency attenuation variation, when the output current of the inverter arrives at the variable level upper limit; and determining an output frequency based on the output frequency attenuation variation.

Abstract: A battery powered, personal air sampler is described which uses a closed loop control circuit to adjust the power that is delivered to an internal pump such that a stable and accurate flow rate is maintained independent of changes in inlet pressure due to filter loading. Furthermore, the described personal air sampler provides improved efficiency to the entire electronic and flow pumping system which, in turn functions to optimize the available battery run time of the device.

Abstract: A motor control device is configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body. The motor control device includes a power supply unit, inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor, and a control unit configured to drive the second motor using rotor position sensorless control. The control unit may be configured to not start up the second motor during a predetermined operation in which a large current flowing through the first motor is being performed.

Abstract: Various embodiments of an electric motor and electronic control for an electric motor are disclosed. An exemplary electric motor comprises a single-phase brushless permanent magnet electric motor. In exemplary embodiments, the electronic motor control is configured to commutate an electric motor at a frequency other than line frequency, perform pulse width modulation, and drive the electric motor with a drive waveform that approximates the counter-electromotive force of the motor.

Abstract: A method for measuring an offset of a resolver is arranged so as to frequently measure and correct the offset of the resolver by actively performing zero current control of a motor. The method includes steps of: determining whether a torque command value of the motor and a magnetic flux value or reverse magnetic flux value of the motor respectively fall within a first range and a second range, which have been set in advance; controlling the motor to perform zero current control for a preset time period when the torque command value of the motor falls within the first range and the magnetic flux value or reverse magnetic flux value of the motor falls within the second range; and measuring the offset of the resolver for the preset time period.

Abstract: A method for determining the state of a brushless motor having first, second and third phases, in some embodiments, comprises: decoupling said motor from a power source; determining whether said motor is rotating or non-rotating; if the motor is rotating, determining a first phase voltage state relative to a common voltage and a second phase voltage state relative to the common voltage, said first phase and second phase voltage states determined when a third phase voltage is within a predetermined range of said common voltage; and if the first phase voltage state and the second phase voltage state are the same, repeating said determination as to whether the motor is rotating or non-rotating.

Abstract: In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor and a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value. The first torque command and the first motor speed and the first DC voltage value are associated with a first current output. The apparatus includes a processor configured to receive a torque input, a DC voltage input, and a motor speed input and determine an output current associated with the torque input, the DC voltage input, and the motor speed input, correct the output current to be within a voltage constraint of the motor when the DC voltage input is than a reference voltage at the motor and output the corrected output current to cause the inverter to provide the input power to the motor.

Abstract: In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor. The apparatus may also include a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value, where the first torque command and the first motor speed and the first DC voltage value are associated with a first current output and a processor. The processor receives a torque input, a DC voltage input, and a motor speed input and identifies the current output associated with the torque input, the DC voltage input, and the motor speed input based on another motor speed different than the motor speed input and another DC voltage different than the DC voltage input and the motor speed input, and output the determined current output to cause the inverter to provide the input power to the motor.

Abstract: A control unit controls a first DC motor and a second DC motor by detecting a rotational position thereof and includes first control means and second control means. The first control means performs a detection of the origin position pattern by controlling each DC motor to rotate toward one side within a detectable range. In case where the rotational position reaches one end of the detectable range, the second control means performs a detection of the origin position pattern by controlling the DC motor to rotate oppositely from the one side when the other DC motor is stopping, and performs a detection of the origin position pattern by controlling the DC motor to rotate oppositely from the one side after the rotational position of the other DC motor reaches the one end of the detectable range when the other DC motor is rotating.

Abstract: A failure in the activation, of a motor, caused by external noise superimposed on an induced voltage is reduced. A detection circuit is connected to a connection node provided between an upper-arm switching element and a lower-arm switching element, and detects the induced voltage of a fan motor before activation. The switching controller activates the fan motor in accordance with a result of detection by the detection circuit. While the detection circuit detects the induced voltage, the switching controller performs switching control which involves alternately turning ON and OFF of the lower-arm switching element.

Abstract: BLDC adaptive zero crossing detection compares BEMF voltages from a floating phase of a BLDC motor to a reference voltage, measures a rising time interval during a rising BEMF period when the BEMF voltages are greater than the reference voltage, and a falling time interval during a falling BEMF period when the BEMF voltages are less than the reference voltage. The reference voltage is adjusted so that the rising and falling time intervals are substantially the same, thereby causing the drive voltage to be in phase with the motor self-generated voltage, thus ensuring maximum efficiency of the BLDC motor.

Abstract: In accordance with an embodiment, a method for driving a motor includes generating a position indicator signal in response to a signal from the at least one Hall sensor, wherein the position indicator signal has a first period. A phase shift value is generated using the position indicator signal. The position indicator signal is used to generate an adjusted position indicator signal in response to the phase shift value. In accordance with another embodiment, a lead angle adjustment circuit includes a counter coupled to a subtractor circuit through a multiplier circuit. A storage register is coupled to the output of the counter and to an input of a slope determination circuit, wherein the slope determination circuit is coupled to a first external pin of the lead angle adjustment circuit. A multiplier circuit is coupled to the slope determination circuit and to a second external pin.

Abstract: The present disclosure provides a single-phase PLL controlling method and a single-phase PLL controlling device. The device includes a first FIR filter, a second FIR filter and a Park converter. The first FIR filter and the second FIR filter are configured to perform FIR filtration on a collected power grid voltage signal so as to acquire filtered signals, and output the filtered signals to the Park converter. A filtered signal V? acquired by the first FIR filter and a filtered signal V? acquired by the second FIR filter form a set of virtual two-phase signals in an ?? coordinate system. The Park converter is configured to perform Park conversion on the filtered signal V? and the filtered signal V?, so as to acquire a set of two-phase signals Vd and Vq in a dq coordinate system.

Abstract: A phase detector includes a crossing-point phase detection circuit to compare signals levels of pairs of sensor signals and output crossing-point phase detection signals indicating phases of crossing points between the pairs of the sensor signals, each having a signal level corresponding to a rotational position of a rotor of a motor having coils, a crossing-point level detection circuit to output crossing-point level signals indicating crossing-point levels detected, a signal selection circuit to select one of the sensor signals as a selection signal, a phase detection circuit to detect that a signal level of the selection signal has reached a threshold level, and output a phase data signal indicating a phase of the rotor corresponding to the threshold level, and an in-phase level adjustment circuit to adjust and output in-phase levels of the sensor signals to approach each of the crossing-point levels to a predetermined signal level.

Abstract: A control apparatus controls an AC motor by detecting current passing through one phase. The apparatus includes an upper controller which includes a torque command calculation section, and a torque monitoring section monitoring torque to determine whether the torque is within a range, and a lower controller which controls current supply to an inverter based on a torque command value to control the motor, and which acquires information on a current-supply state and a rotation state of the motor and transmits information on a control state to the upper controller. At least one of the controllers estimates a current estimate value of an estimated phase or a d-q axis current estimate value based on a current detection value of the one phase and an electrical angle, and calculates information for monitoring torque based on the current estimate value. The torque monitoring section monitors the torque based on the information.

Abstract: An angle grinder including at least one boost mode unit configured to provide a boost mode, and a switching-over unit configured to switch over between a conventional mode and the boost mode.

Abstract: A controlling circuit of the brushless motor driving circuit turns on a switch circuit to provide an electrical conduction between a fixed potential and a neutral point or an electrical conduction between the fixed potential and a first to third output nodes, in a case where the first to third output node bring into a floating state when a three-phase brushless motor is rotating.

Abstract: Even when the effective radii of wheels differ from each other because of a change in tire pneumatic pressure, the difference in driving force between left and right drive wheels are substantially zeroed to suppress a turning force to thereby increase the traveling stability. The use is made of a corrector for correcting a command value to be outputted to a drive circuit for an electric drive motor for each of the drive wheels. This corrector receives the steering angle, the respective numbers of revolutions of the drive wheels and an electric drive motor current and corrects with the use of the steering angle as measured with respect to a traveling direction so that command values relative to the drive wheels may have such a relation that the turning force induced in a vehicle as a result of the difference in effective radius between the drive wheels can be suppressed.

Abstract: A control circuit controls a fan to cool an integrated baseboard management controller (iBMC) in a server. The control circuit includes a state determination module. When the server is powered off and the iBMC is operating, the state determination module receives low level signals from a power supply unit (PSU) and the iBMC. The state determination module connects the PSU and the fan, such that the fan is operating. When the server and the iBMC are powered off, the state determination module receives a low level signal from the PSU and a high level signal from the iBMC. The state determination module disconnects the PSU from the fan, turning the fan off. When the server is operating, the state determination module receives a high level signal from the PSU. The state determination module disconnects the PSU from the fan, turning the fan off.

Abstract: An electrical controller for electric motors is provided. A control system for an electric motor comprises a supply for supplying excitation current to different windings of the motor at any given time. Furthermore, the amplitude of the excitation current is independently variable of the timing and duration of the application of the excitation current to the windings. This allows increased control of the motor and facilitates the operation of the motor at high mechanical and/or electrical speeds.

Abstract: A control apparatus of an AC motor improves an electric current estimation accuracy of the AC motor. The control apparatus includes an electric current estimation unit that repeatedly performs an inverted dq conversion, a dq conversion, and a correction process. Based on a d/q axis electric current estimate values of a previous cycle, the inverted dq conversion calculates an electric current estimate value of a sensor phase. The dq conversion calculates a d/q axis electric current correction values based on an electric current estimation error of the sensor phase, which is derived from the electric current estimate value and the electric current detection value detected by an electric current detector. The correction process calculates the d/q axis electric current estimate values of a current cycle by correcting the d/q axis electric current estimate values of the previous cycle by using the d/q axis electric current correction values.

Abstract: A motor controlling apparatus includes a first target torque value calculator, a frequency detector, a second target torque value calculator, a torque command value calculator, a torque limiter, and a controller. The first target torque value calculator calculates a first target torque value, which is a target value of an output torque of a motor. The frequency detector detects a motor rotational frequency. The second target torque value calculator calculates a second target torque value based on the rotational frequency. The torque command value calculator mathematically combines (e.g., adds) the first and target torque values to calculate a torque command value. The torque limiter sets the signs of the first target torque value and the torque command value to be equal to limit the torque command value according to the first target torque value. The controller controls the motor based on the limited torque command value.

Abstract: A motor speed controller controls a motor speed to generate a phase reference pulse; generates a FG pulse per rotary angle of the motor; detects a difference between the number of phase reference pulses and the number of FG pulses for output as an integer number phase difference; detects and measures a time difference between an edge of the phase-reference pulse and an edge of the FG pulse in units of the reference clock for output as a decimal fraction phase difference; adds the integer number phase difference to the decimal fraction phase difference at a predetermined ratio for output as a phase difference; and controls driving of the motor in accordance with the phase difference.

Abstract: An anti-rebounding control apparatus is provided, which includes an anti-rebounding controller outputting a first command for setting a torque limit value to “0” if an electric motor speed value is equal to or smaller than an upper threshold value and equal to or larger than a lower threshold value in the case where a speed command value of “0” is input and outputting a second command for setting the torque limit value to a maximum value if the electric motor speed value is smaller than the lower threshold value, a torque regulator setting the torque limit value to “0” when the first command is input and setting the torque limit value to the maximum value when the second command is input, and an electric motor inverter intercepting a power that is supplied to an electric motor if the torque limit value is set to “0” and re-supplying the power to the electric motor if the torque limit value is set to the maximum value.

Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate advance angle value corresponding to the speed of the motor that is set can be automatically set. The motor control circuit according to the present invention includes an advance angle setting means that adds a reference advance angle value to an advance angle correction value obtained by multiplying a proportional coefficient by a correction amount and outputs an advance angle setting signal, and an advance angle setting correction means that uses a ratio of a correction reference period relative to a period of a reference signal input from the outside as a correction amount and corrects the reference advance angle value by an advance angle correction value obtained by multiplying the correction amount by a predetermined proportional coefficient of the advance angle setting means.

Abstract: Disclosed is a system and method of controlling an inverter to reduce noise in an eco-friendly vehicle. In the method, at least one of a current motor torque and a current motor speed is monitored in real-time. It is determined whether or not the at least one of the current motor torque and the current motor speed corresponds to a noise occurrence range set to a current switching frequency. A changed switching frequency value corresponding to the at least one of the current motor torque and the current motor speed is calculated when the at least one of the current motor torque and the current motor speed corresponds to the noise occurrence range. A PWM signal is generated using the changed switching frequency value to control an inverter.