Abstract: A propulsion system for an electric vehicle comprising a high voltage battery unit having a first high voltage battery connected in series with a second high voltage battery, which may also be referred to as a first and second battery bank, and one or more power inverters arranged to connect the battery banks to one or more electric machines. The one or more power inverters and the one or more electric machines are configured to form a first and a second three-phase system. The described architecture incorporating dual battery banks, and dual and/or multiphase inverters and electric machines can provide enhanced redundancy and limp home functionality in cases where a fault or error occurs in the inverter and/or in the electric machine so that a faulty three-phase system can be operated in a safe-state mode.

Abstract: A robust position control method for a permanent magnet synchronous motor considering current limitation is provided. The method fully considers the influence of current limitation on a closed loop system in controller design, stability analysis and other theoretical analysis phase, can effectively overcome the influence of system disturbances including system parameters uncertainty and unknown load torque, and finally realize a control objective of accurate tracking of the motor position. More importantly, the technology is a continuous control method which can overcome the inherent chattering problem while having strong robustness of sliding mode control. Meanwhile, a controller designed by the present invention also has the advantages of simple structure, etc. The technical solution proposed by the present invention has wide practical application prospect due to the characteristics of excellent anti-disturbance capability, and simple and feasible structure.

Abstract: The invention relates to a system 1 for controlling a voltage converter comprising a plurality of high-side switches forming a high group and a plurality of low-side switches forming a low group, the control system 1 comprising: a module 10 for measuring a voltage V of the DC voltage source B, a module 11 for comparing the measured voltage V with a first safety threshold OV1, a control module 12 for controlling a first group of switches so as to close chosen from the high group or the low group, if the comparison module 11 indicates that the measured voltage V is higher than the first safety threshold OV1.

Abstract: A circuit that increases input voltage to higher output voltage connected to a variable frequency drive in an appliance. Several switching arrangements, timing, and safety mechanisms are in place to assist. When the circuit experiences high draw, high voltage output values of circuit decrease over time, but different aspects of the circuit can be constructed so that the amount of time required at a higher voltage does not exceed the amount of time in which the high voltage output is provided.

Abstract: A motor driving system includes motor driving circuitry configured to operate an electric motor. The system further includes a controller that is configured to send a signal to energize the electric motor and to measure a back electromotive force voltage of the electric motor. The controller is further configured to determine a temperature value based on the measured back electromotive force voltage using a back electromotive force voltage mapping that maps back electromotive force voltages to temperature values. The controller is further configured to determine an expected winding resistance value based on the determined temperature value using a resistance mapping that maps winding resistance values to temperature values. The controller is further configured to measure a winding resistance of the electric motor, to compare the measured winding resistance of the electric motor to the expected winding resistance value, and to output a match result indication based on the comparison.

Abstract: The present disclosure relates to a motor control device and method. The motor control device includes an inverter for driving a motor, a first shunt resistor connected to a first low-side switching element included in the inverter, a second shunt resistor connected to a second low-side switching element included in the inverter, a DC-link shunt resistor in series with the inverter, and a controller for controlling the inverter based on first current value measured through the first and second shunt resistors and a second current value measured through the DC-link shunt resistor.

Abstract: A motor controller comprises a switch circuit and a driving circuit. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. The motor controller utilizes a first pulse width modulation waveform and a second pulse width modulation waveform for driving the three-phase motor, where the first pulse width modulation waveform and the second pulse width modulation waveform have different frequencies from each other. The motor controller utilizes the second pulse width modulation waveform to detect a phase switching time point, where the frequency of the first pulse width modulation waveform is greater than the frequency of the second pulse width modulation waveform.

Abstract: A motor-driving control system includes an actuator configured to generate rotational force by driving received current, a current provider configured to provide current to the actuator while repeatedly turning on and off the current at a preset period and duty, and a controller configured to estimate a rotation position or a rotation speed of the actuator in a section in which the current of the current provider is turned on or off and to control the current provider to follow a speed command based on the estimated rotation position or rotation speed.

Abstract: Control circuits control inverter circuits provided in correspondence to the control circuits by a drive mode selected from a plurality of drive modes. A cooperative drive mode is for controlling a current supply to motor windings by a plurality of systems by using a value acquired from the other control circuit via communication. An independent drive mode is for controlling the current supply to the motor windings by the plurality of systems without using the value acquired from the other control circuit. A one-system drive mode is for controlling the current supply to the motor winding by one system without using the value acquired from the other control circuit. The control circuits set the drive mode to a cooperative drive mode when inter-computer communication is normal. The control circuits set the drive mode to an independent drive mode or a one-system drive mode thereby differentiating an output characteristic of a motor from that in the cooperative drive mode.

Abstract: A method accurately detects biting of a foreign object in a packaging machine. A control apparatus controls a packaging machine that sequentially seals and/or cuts a packaging material transported in a first direction using a rotor. The rotor is arranged to have a tangent to its outer circumference portion in contact with the packaging material extending in the first direction. The rotor is drivable and rotatable by a driver. The control apparatus includes an information obtaining unit that obtains information indicating a rotational position of the rotor and a status value of the driver in predetermined cycles, and a determination unit that determines a presence of an abnormality in a sealed portion of the packaging material using, from the information obtained by the information obtaining unit, a status value of the driver corresponding to a rotational position of the rotor falling within a predetermined range or being a predetermined position.

Abstract: A method of controlling a 3n-phase electrical machine (7) by means of n power converters (3a, 3b) each being controlled by a respective controller, and each power converter (3a, 3b) being configured to power a respective set of three phases of the electrical machine (7), wherein the method for each controller comprises: a) obtaining measured currents (ia,1, ib,1, ic,1, ia,2, ib,2, ic,2) of the set of three phases of the electrical machine (7) controlled by the controller, b) estimating all currents ({circumflex over (?)}dq, 2, {circumflex over (?)}dq, 1) of all the other sets of three phases of the electrical machine (7), which are controlled by the other controllers, c) transforming the measured currents (ia,1, ib,1, ic,1, ia,2, ib,2, ic,2) and all the estimated currents ({circumflex over (?)}dq,2, {circumflex over (?)}dq,1) using vector space decomposition, VSD, to obtain a set of VSD currents, and d) controlling the corresponding power converter based on the VSD currents.

Abstract: A PMSM sensorless composite control method with dual sliding-mode observers is provided. In particular, two sliding-mode observers are designed, one provides an exponential piecewise sliding-mode function for observation of back electromotive force, and the other sliding-mode observer is for observation of load torque and fine-tuning parameters of a piecewise PI controller while introducing an estimated load torque onto a q-axis for feedforward compensation. A q-axis current inner loop is designed with a second-order sliding-mode controller, which can improve tracking performance of q-axis current and indirectly control an electromagnetic torque. The exponential piecewise sliding-mode function is more conductive to the observation of back electromotive force and can weaken the buffeting phenomenon. The sliding-mode observer for observing the load torque fine-tunes parameters of the piecewise PI controller while performing the feedforward compensation, the load capability of the system is improved.

Abstract: A motor control system is configured to: determine a current supply limit for an electric motor; receive a current supply of the electric motor; identify one or more motor commands; adjust the one or more motor commands in response to a determination that the current supply is greater than the current supply limit; and selectively control the electric motor using the adjusted one or more motor commands.

Abstract: In an embodiment of the present disclosure, a heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a refrigerant loop and a compressor disposed along the refrigerant loop. The compressor is configured to circulate refrigerant through the refrigerant loop. The HVAC&R system also includes a motor configured to drive the compressor and a variable speed drive (VSD) configured to supply power to the motor. The VSD further includes a first power pod configured to supply a first power to the motor and a second power pod configured to supply a second power to the motor.

Abstract: In a method for detecting a motor phase fault of a motor arrangement, the motor phases of which are connected to a drive circuit having a DC voltage intermediate circuit and an inverter. A motor phase voltage at at least one of the motor phases with respect to a reference potential is captured while the inverter is switched off; and a voltage profile of the captured motor phase voltage is used to determine whether there is a motor phase fault on one of the motor phases of the motor arrangement.

Abstract: A motor can be controlled in a user-friendly manner so that a phase current based on an input command torque command value is caused to flow to at least one among U-phase, V-phase, and W-phase windings of the motor, so that a predetermined in-phase current is superimposed on the phase current and caused to flow to at least one among the windings. The motor is controlled such that energization to one winding corresponding to a predetermined energization stop phase is stopped, for example, so that energization to the U-phase winding is stopped, and so that a V-phase current, a W-phase current and an in-phase current are caused to flow to each winding corresponding to a phase other than the energization stop phase, for example, so that the V-phase current, the W-phase current and the in-phase current are caused to flow to the V-phase winding and the W-phase winding.

Abstract: A surgical instrument includes: an end effector; a power source; a motor coupled to the power source, the motor configured to actuate the end effector; and a controller operatively coupled to the motor and configured to control the motor based on a current draw of the motor and an angular velocity of the motor.

Abstract: A control device for a motor including a first coil and a second coil which are insulated from each other is provided. The control device includes a first circuit and a second circuit that switches a first process to a second process when the first circuit fails. The external circuit generates an instruction for performing a process of increasing an amount of operation which is calculated by one of the first circuit and the second circuit according to the number of control systems when the other of the first circuit and the second circuit fails.

Abstract: A regenerative braking system includes a motor configured to rotate at a variable rotational speed in response to receiving power from a three-phase power supply, and a regenerative braking circuit in signal communication with the three-phase power supply to control the rotational speed of the motor. A brake controller is in signal communication with the regenerative braking circuit and is configured to selectively operate the regenerative braking circuit in a plurality of different braking modes based on the rotational speed of the motor.

Abstract: A motor control system includes: a d-q target module configured to, based on a target torque of an electric motor, determine a first target d-axis current and a first target q-axis current; an offset module configured to, based on a capacitor current through capacitors connected across phases of the electric motor, determine a d-axis current offset and a q-axis current offset; an adder module configured to determine a second target d-axis current based on a sum of the first target d-axis current and the d-axis current offset and to determine a second target q-axis current based on a sum of the first target q-axis current and the q-axis current offset; and a driver module configured to, based on the second target d-axis current and the second target q-axis current, switch switches of a current source inverter (CSI) module configured to apply power to the phases of the electric motor.