A method of controlling a coasting torque using an electric motor for a vehicle having the electric motor includes: determining a speed range to travel on a forward slope based on the current vehicle speed; determining a target speed within the speed range based on the coasting torque and a travel load depending on vehicle speed; and correcting a driving force of the electric motor in response to the determined target speed.

The present disclosure relates to a motor control system and method based on current feedback signal. The motor control system includes a control apparatus, a linear motor, and a current feedback apparatus, where an output end of the control apparatus is connected to the linear motor for calculating a displacement error of a previous moment to obtain a control output value of a current moment, and converting the control output value into a voltage signal for transmission to the linear motor; the linear motor is configured to vibrate according to the voltage signal input by the control apparatus; and the current feedback apparatus is connected to the linear motor, and is configured to: convert a measured current value of the linear motor into an actual displacement value of the current moment, and feed back the actual displacement value to an input end of the control apparatus.

A method of controlling a coasting torque using an electric motor for a vehicle having the electric motor includes: determining a speed range to travel on a forward slope based on the current vehicle speed; determining a target speed within the speed range based on the coasting torque and a travel load depending on vehicle speed; and correcting a driving force of the electric motor in response to the determined target speed.

The present disclosure relates to a motor control system and method based on current feedback signal. The motor control system includes a control apparatus, a linear motor, and a current feedback apparatus, where an output end of the control apparatus is connected to the linear motor for calculating a displacement error of a previous moment to obtain a control output value of a current moment, and converting the control output value into a voltage signal for transmission to the linear motor; the linear motor is configured to vibrate according to the voltage signal input by the control apparatus; and the current feedback apparatus is connected to the linear motor, and is configured to: convert a measured current value of the linear motor into an actual displacement value of the current moment, and feed back the actual displacement value to an input end of the control apparatus.

An electric vehicle acceleration control system includes an electric motor configured to drive wheels of an electric vehicle, a steering wheel configured to steer the wheels of the electric vehicle, an acceleration paddle adjacent the steering wheel, and a vehicle control module configured to, in response to detecting activation of the acceleration paddle, set a target speed value, determine an average acceleration value to reach the target speed value, obtain a stored torque profile according to the target speed value and the average acceleration value, the stored torque profile including a specified torque value for each of multiple speed breakpoints, and control the electric motor by commanding the specified torque value at each of the multiple speed breakpoints.

A driving circuit of a PMSM can include a current sampling circuit configured to generate a current sampling signal by sampling a stator current information of one phase of the permanent magnet synchronous motor; a BEMF circuit configured to receive the current sampling signal and a voltage sampling signal that represents a stator voltage of the phase, to estimate back electromotive force information of the phase, and to output a first voltage signal that represents the back electromotive force information; and a torque regulating circuit configured to generate an angle difference signal by calculating an angle difference between the first voltage signal and the current sampling signal, where the angle difference signal is configured to regulate an amplitude of a first U-shaped modulation wave such that a rotor current is in phase with the first U-shaped modulation wave for maximum torque per ampere.

A driving circuit of a PMSM can include a current sampling circuit configured to generate a current sampling signal by sampling a stator current information of one phase of the permanent magnet synchronous motor; a BEMF circuit configured to receive the current sampling signal and a voltage sampling signal that represents a stator voltage of the phase, to estimate back electromotive force information of the phase, and to output a first voltage signal that represents the back electromotive force information; and a torque regulating circuit configured to generate an angle difference signal by calculating an angle difference between the first voltage signal and the current sampling signal, where the angle difference signal is configured to regulate an amplitude of a first U-shaped modulation wave such that a rotor current is in phase with the first U-shaped modulation wave for maximum torque per ampere.

An electric vehicle acceleration control system includes an electric motor configured to drive wheels of an electric vehicle, a steering wheel configured to steer the wheels of the electric vehicle, an acceleration paddle adjacent the steering wheel, and a vehicle control module configured to, in response to detecting activation of the acceleration paddle, set a target speed value, determine an average acceleration value to reach the target speed value, obtain a stored torque profile according to the target speed value and the average acceleration value, the stored torque profile including a specified torque value for each of multiple speed breakpoints, and control the electric motor by commanding the specified torque value at each of the multiple speed breakpoints.