A motor control system is provided for field-oriented control of an electric motor for driving a vehicle. The motor control system includes a current setpoint creator, which is designed to receive a torque setpoint as an input signal and to output a torque-creating current setpoint and at least one field-creating current setpoint as output signals in order to control the electric motor in a field-oriented manner. An exceptional situation detection device detects a present torque setpoint, calculates a change based on the present torque setpoint and an earlier torque setpoint, and detects an exceptional situation if the magnitude of the change exceeds a specified threshold value. The motor control system is designed to adapt the torque-creating current setpoint based on the present torque setpoint when the exceptional situation is detected, thereby bypassing the current setpoint creator.

A motor control system is provided for field-oriented control of an electric motor for driving a vehicle. The motor control system includes a current setpoint creator, which is designed to receive a torque setpoint as an input signal and to output a torque-creating current setpoint and at least one field-creating current setpoint as output signals in order to control the electric motor in a field-oriented manner. An exceptional situation detection device detects a present torque setpoint, calculates a change based on the present torque setpoint and an earlier torque setpoint, and detects an exceptional situation if the magnitude of the change exceeds a specified threshold value. The motor control system is designed to adapt the torque-creating current setpoint based on the present torque setpoint when the exceptional situation is detected, thereby bypassing the current setpoint creator.

A motor controller that is configured to switch power supply phases of the motor, to perform a limit-position abutment control by rotating the motor to a movable limit of a movable range of the rotation object to learn a reference position of the motor, perform a power-saving return control afterwards, in which a power supply to the motor is stopped, thereby returning a rotation position of the motor toward a target rotation position, and stop the rotation of the motor by simultaneously supplying power to a preset phase of the motor, when the rotation position of the motor reaches the target rotation position. In such manner, the power consumption as well as the heat generation of the motor are reduced for returning the rotation position of the motor to a preset rotation position after the abutment control of the motor.

A method of controlling an electric motor to optimize system efficiency of an electric motor operable in a pulsed mode and a continuous mode is disclosed herein. The method includes receiving a requested torque for the electric motor, calculating a pulsed system efficiency, calculating a continuous system efficiency, and operating the electric motor in the pulsed mode when the pulsed system efficiency is greater than the continuous system efficiency. The pulsed system efficiency is calculated for delivering the requested torque from the electric motor in a plurality of torque pulses greater than the requested torque. The continuous system efficiency is calculated for delivering the requested torque from the electric motor as a continuous torque. The system efficiency may be at least partially based on a battery efficiency and a motor efficiency.

A motor driving apparatus includes a boosting section, a drive voltage output section, a detecting section, a storage section and a determining section. The boosting section generates a post-boosting voltage by boosting an input voltage. The drive voltage output section generates a drive voltage to drive a motor using the post-boosting voltage. The detecting section detects a value of the input voltage or a variation width relative to a reference value of the input voltage as variation power source variation information when there is power source variation. The storage section stores target value association information associating the power source variation information and a boosting target value of the post-boosting voltage. The determining section determines the boosting target value based on the power source variation information and target value association information. The target value association information is determined based on a range of operations of the drive voltage output section.

An electric motor controller and methods of determining which input power line of a plurality of input power lines of a motor drive controller has been energized are provided. An electric motor controller configured to be coupled to an electric motor includes a plurality of power input lines configured to receive an alternating current (AC) input voltage from an AC power source, an energized line detection device configured to sense that a power input line has been energized by the AC power source, and configured to output an isolated signal, and a rectifier configured to convert the AC input voltage having a frequency to a direct current (DC) voltage. The controller also includes a computing device coupled downstream from the energized line detection device and configured to determine which input power line has been energized.

A method for controlling a vehicle converter includes: acquiring, by a controller, required maximum voltages and required minimum voltages of a first motor and a second motor using required torque and a rotation speed of the first motor and the second motor; acquiring voltage commands of the first motor and the second motor using the rotation speed and a magnetic flux of the first motor and the second motor; acquiring a corrected voltage command using the voltage commands of the first motor and the second motor; acquiring an output voltage command of the converter using the required maximum voltage and the required minimum voltage of the first motor and the second motor, the corrected voltage command, and a voltage of a battery; and controlling an output voltage of the converter using the output voltage command.

The present disclosure provides a method for improving the computational efficiency of an electromagnetic transients program (EMTP-type) phase domain synchronous machine model. The method comprises: acquiring a traditional phase domain synchronous machine model; acquiring matrix relations between mutual inductance matrices of stator windings and rotor windings according to a trigonometric transformation equation; substituting the matrix relations into the original expression of R.sub.eq and the original formulation of e.sub.h(t), respectively, and deriving to obtain a simplified formulation of the equivalent resistance matrix R.sub.eq and a simplified formulation of the total history term e.sub.h(t); and acquiring an efficient phase domain synchronous machine model. According to the embodiment of the disclosure, in the provided model, the equivalent resistance matrix of the phase domain synchronous machine model and the matrix used in the calculation of the history term are converted into constant sparse matrices, thereby improving the calculation efficiency of the model.

A drive control device include a processor and a memory including instructions that, when executed by the processor, cause the processor to perform operations. The operations include: comparing a rotation speed of a motor driven by a PWM control of a synchronous rectification type and a target value of the rotation speed and calculating an error speed; calculating a torque required in the motor based on the calculated error speed; calculating a drive voltage of the motor in the synchronous rectification type based on the calculated torque, the rotation speed of the motor, and an electrical specification of the motor; and setting a duty ratio of a PWM signal in the synchronous rectification type based on the calculated drive voltage.

A drive control device include a processor and a memory including instructions that, when executed by the processor, cause the processor to perform operations. The operations include: comparing a rotation speed of a motor driven by a PWM control of a synchronous rectification type and a target value of the rotation speed and calculating an error speed; calculating a torque required in the motor based on the calculated error speed; calculating a drive voltage of the motor in the synchronous rectification type based on the calculated torque, the rotation speed of the motor, and an electrical specification of the motor; and setting a duty ratio of a PWM signal in the synchronous rectification type based on the calculated drive voltage.