Abstract: An inverter control method for a hybrid vehicle includes: monitoring a torque command and a motor speed of the vehicle in real-time; determining whether the motor speed is less than a first speed; determining whether an absolute value of the torque command is less than a first torque when the motor speed is less than the first speed; changing a switching frequency to a predetermined frequency when the absolute value of the torque command is less than the first torque; and controlling an inverter operation by generating a pulse-width modulation (PWM) signal with the switching frequency changed to the predetermined frequency.

Abstract: Hybrid motor drive circuits configured to drive a motor are provided herein. A hybrid motor drive circuit includes an inverter coupled to the motor and configured to drive the motor when a motor commanded frequency is not within a predetermined range of line input power frequencies. The hybrid motor drive circuit also includes a first switch device configured to couple line input power to an output of the inverter when the motor commanded frequency is within the predetermined range of line input power frequencies.

Abstract: A device comprises a motor/generator having an air gap and a plurality of windings, a plurality of power converter groups, and a control system. The windings are so configured that the number of phases in a pair of poles and the number of poles of the motor/generator can be dynamically adjusted. The power converter group comprises a plurality of power converters which is coupled between an input voltage source and a plurality of windings for controlling currents in the windings. The control system is so configured such that the number of poles of the motor/generator and the number of phases in a pair of poles are dynamically adjusted, and a synchronous speed of a moving magnetic field generated by winding currents within first pair of poles is approximately equal to a synchronous speed of a second moving magnetic field generated by currents in the windings within second pair of poles.

Abstract: A method for controlling a permanent magnet synchronous electrical machine powered by a battery delivering a supply voltage to terminals of the battery, the method including: calculating an initial direct voltage component Vdc and an initial quadratic voltage component in a rotating reference; checking a saturation condition; calculating an angle ? of a formula; generating voltages to be applied to the electrical machine if ? varies negatively and Vdc is positive or if ? varies positively and V dc is negative. The method for example can be applied in a control of synchronous electrical machines.

Abstract: The invention relates to a power module (9) for converting an electric current flowing between an accumulator and an alternating-current motor, said module (9) comprising switching means (10) that can be controlled to authorize the powering of the motor and/or the charging of the accumulator, and an intrinsic control unit (13) connected to said switching means (10) and capable of delivering opening and/or closing signals to said switching means (10), said intrinsic control unit (13) being further capable of exchanging data with a remote control unit, with a potential barrier.

Abstract: A motor driving device includes a control unit which outputs a pre-driving signal to control a motor based on command information of an input target number of rotations and detection information of a number of rotations of the motor, and a motor driving unit which drives the motor based on the pre-driving signal. The control unit includes a speed control circuit which outputs speed command information based on the command information of the target number of rotations and the detection information, a stop control circuit which when an input of the command information of the target number of rotations is stopped, outputs stop command information after a predetermined time elapses from detection of stop of the motor, and a driving signal generation circuit which generates a control signal based on the stop command information and the speed command information.

Abstract: An electronically commutated motor is operated from a DC voltage source (UB), e.g. from a DC link circuit (46). The motor has a permanent-magnet rotor (28) and a stator having a stator winding strand (26) in which, during operation, an alternating voltage is induced by the permanent-magnet rotor (28). It further has an H-bridge circuit (22) having power semiconductors (T1 to T4). At the beginning of a commutation operation, the presently conductive semiconductor switch of a first bridge half (38) is switched off, in order to interrupt energy delivery from the DC voltage source (UB), so that, in the other bridge half (56), a loop current (i*; ?i*) flows through the stator winding strand (26), through the semiconductor switch still controlled to be conductive therein, and through a recovery diode (58; 60) associated with the blocked semiconductor switch of that other bridge half.

Abstract: A machine learning apparatus learns conditions associated with power failure on the side of an AC power supply in a motor control apparatus which converts AC power into DC power, outputs the DC power to a DC link, further converts the DC power into AC power for driving a motor, and supplies the AC power to the motor, includes a state observation unit which observes a state variable including at least one of data associated with the value of a power supply voltage on the AC power supply side, data associated with the amount of energy stored in a DC link capacitor provided in the DC link, and data indicating whether a protective operation for the motor control apparatus is successful, and a learning unit which learns conditions associated with power failure on the AC power supply side in accordance with a training data set defined by the state variable.

Abstract: An angle detecting device includes a rotatably supported magnet, and a magnetic sensor disposed opposite to the magnet. An output of the magnetic sensor is changed based on a magnetic flux change due to a rotation of the magnet. The magnet is disposed such that a distance between the magnetic sensor and the magnet is changed by the rotation of the magnet.

Abstract: In accordance with an embodiment, a circuit includes a snubber circuit configured to be coupled to outputs of n half-bridge driver circuits that are coupled to n corresponding inductive loads, such that n is an integer greater than one. The snubber circuit includes n diodes and n capacitors. Each of the n diodes are coupled between a corresponding output of the n half-bridge driver circuits and a floating common node, and each of the n capacitors coupled between a corresponding output of the n half-bridge driver circuits and the floating common node.

Abstract: An air conditioner controller and a safety protection circuit for the same are provided. The air conditioner controller includes a central processing unit, a drive unit, a safety locking unit and a protection detection unit, where the central processing unit is configured to output an air conditioner control signal; the air conditioner motor drive unit is configured to receive a drive control signal output from the safety locking unit and the detection protection signal, and output a drive signal to control an operation of an air conditioner motor; the safety locking unit is configured to receive the detection protection signal and the air conditioner control signal, output the drive control signal, and control the air conditioner control signal to be transmitted or cut off based on the detection protection signal output from the protection detection unit.

Abstract: An electric tool includes a brushless motor and an output part, which is driven by the brushless motor and to which a tip tool is mounted, and a tumbler switch. The tumbler switch applies, to the control unit, a stop signal for stopping the brushless motor at a neutral position, a forward rotation signal for forward rotating the brushless motor by an operation in a first direction, and a reverse rotation signal for reversely rotating the brushless motor by an operation in a second direction.

Abstract: A motor controller, including: a box body, a capacitor module, and an inverse module. The box body includes a chamber, and a radiator is disposed in the chamber. The radiator divides the chamber to yield a first chamber and a second chamber. The inverse module is disposed on an upper surface of the radiator in the first chamber. The capacitor module is disposed on a lower surface of the radiator in the second chamber. The radiator includes a cooling waterway, and a water inlet and a water outlet that communicate with the cooling waterway. The cooling waterway is adapted to cool the capacitor module and the inverse module.

Abstract: A method for estimating operation parameters of a servomotor is described. The method includes the steps of: driving the servomotor to rotate stably at an initial angular velocity; computing d- and q-axis components of an initial voltage when the servomotor rotates at the initial angular velocity; accelerating the servomotor to a predetermined angular velocity according to the initial voltage; and computing at least one operation parameter of the servomotor after the servomotor rotates at the predetermined angular velocity.

Abstract: An air moving appliance comprising an electric motor coupled to a fan, a control system for controlling the motor, the control system including monitoring means configured to monitor a motor load parameter; memory means configured to store a predetermined reference motor load parameter value; compensating means that determines a compensated reference motor load parameter value based on the predetermined reference motor load parameter value and a set of ambient environment input conditions; comparison means configured to compare the motor load parameter and the compensated reference motor load parameter value and trigger an operational event based on the result of the comparison. The invention also relates to a method of controlling an air moving appliance.

Abstract: The invention relates to a method for controlling a water sluice gate drive for a water sluice gate, in particular for a roller sluice gate, preferably in a hydroelectric power plant, wherein the drive has an electric machine, in particular has an asynchronous machine, in particular an asynchronous motor/generator. According to the invention, it is provided that the electric machine, in particular an asynchronous machine, has a fan brake, wherein the method comprises the steps of: disengagement of the fan brake in the case that an insufficient power supply is indicated, self-actuated operation of the electric machine, in particular an asynchronous machine, wherein the electric machine, in particular an asynchronous machine, is operated in generative island operation, in which a rotating field is generated in a self-actuating manner.

Abstract: A CPU obtains a difference between a data number at timing when an ENC0 signal or an ENC1 signal changes in a case where there is no follow-up delay of a rotor relative to a voltage signal applied to an A-phase coil and a B-phase coil and a data number at timing when the ENC0 signal or the ENC1 signal changes in a case where there is a follow-up delay of the rotor relative to the voltage signal applied to the A-phase coil and the B-phase coil. Then, the CPU controls the voltage signal applied to the A-phase coil and the B-phase coil based on the obtained difference.

Abstract: A method and an arrangement for limiting the interference to a common electric power network, generated by a power electronics device, e.g. a frequency converter, which power electronics device comprises of at least one switch type component being able to change the output voltage value at a predefined permissible switching frequency range. The method comprises scanning through the permissible switching frequency range, recording measured common mode current values as a function of the switching frequency, and setting the final switching frequency of the switch type component out of a value where a local maximum value of the common mode current has been recorded.

Abstract: When a control device determines, based on a sampling number in one period of a target modulation factor waveform, that the sampling number is less than a predetermined value in a case where a two-phase modulation scheme is selected and the target rotation number increases, the control device switches a modulation scheme from the two-phase modulation scheme to a three-phase modulation scheme.

Abstract: A method is performed by a drive circuit that controls a brushless motor. The brushless motor includes a rotor and a coil structure. The coil structure includes at least one coil. The circuit receives an instruction to drive the rotor in a forward direction. The circuit senses a residual direction of the rotor and a residual speed of the rotor. At least partially in response to the sensed residual direction being reverse direction which is opposite the forward direction, the circuit determines a time period as a function of the sensed residual speed, for applying a brake to the motor to slow the rotor. The brake is applied for the determined time period. After lapse of the determined time period, the circuit initiates driving the rotor to rotate in the forward direction.