A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a phase current soft chopper control in a low rotating speed region and an angle position control in a high rotating speed region. The current regulator performs soft chopper hysteretic current regulation. The angle optimization controller optimizes a turn-on angle and a turn-off angle of a power converter master switch to reduce torque pulsation and improve braking energy feedback efficiency. The torque estimator conducts an on-line estimation of an actual braking torque estimated value of the motor based on an actual phase voltage and current of the motor to achieve braking torque signal feedback.

The embodiments herein disclose a switchover asymmetric H-Bridge circuit for series and parallel mode operation of a switched reluctance motor (SRM) motor. In an embodiment, the proposed switchover asymmetric H-Bridge circuit is used to achieve higher inductance and torque at lower speeds and lower winding inductance to reach higher speeds of operation. In an embodiment, an asymmetric H-Bridge topology that has been modified to support series-parallel switch-over by using only two extra devices (MOSFET switches). Further, the ability to switch between higher inductance/torque production and lower inductance/high speed operation.

The embodiments herein disclose a switchover asymmetric H-Bridge circuit for series and parallel mode operation of a switched reluctance motor (SRM) motor. In an embodiment, the proposed switchover asymmetric H-Bridge circuit is used to achieve higher inductance and torque at lower speeds and lower winding inductance to reach higher speeds of operation. In an embodiment, an asymmetric H-Bridge topology that has been modified to support series-parallel switch-over by using only two extra devices (MOSFET switches). Further, the ability to switch between higher inductance/torque production and lower inductance/high speed operation.

A switch reluctance motor wide speed-regulation range cross-control method, the switch reluctance motor wide speed-regulation range control system consisting of a revolving speed regulator, a current chopper controller, an angle position controller, a chopper counter, a comparison selector and two resettable constant registers; the chopper counter counts the current chopping number of each electrical period, and according to the comparison result between a counting value of the chopper counter and a constant value set by the two constant registers, the comparison selector selects the current chopper controller or the angle positon controller, such that when in the three phases of low revolving speed, medium revolving speed and high revolving speed or in the runtime of acceleration, deceleration and uniform velocity, the current chopper controller and the angle positon controller can automatically switch, and seamlessly connect without being affected by load change, and switching from a turn-on angle to a turn-off angle will not cause fluctuation of torque or revolving speed of a switch reluctance motor, thus the switch reluctance motor system runs stably and has good value for engineering application.

A controller of an oil pressure control system for an automatic transmission, the system including: a manual valve having a sleeve and a spool and changing an oil passage to the automatic transmission; a detent lever having engagement grooves and positioning the spool; an engagement member including an engagement unit for the grooves and a bias unit biasing the engagement unit; and a motor rotating the detent lever, comprises: a shift range detecting unit; a range switch determining unit determining whether the shift range is switched; a temperature detecting unit; a temperature determining unit determining whether environmental temperature is lower than a predetermined temperature; and a power controlling unit supplying, to the motor, power for setting a maximum value of a rotary torque of rotating the detent lever to be a predetermined value when the shift range is switched and the environmental temperature is lower than the predetermined temperature.

A controller of an oil pressure control system for an automatic transmission, the system including: a manual valve having a sleeve and a spool and changing an oil passage to the automatic transmission; a detent lever having engagement grooves and positioning the spool; an engagement member including an engagement unit for the grooves and a bias unit biasing the engagement unit; and a motor rotating the detent lever, comprises: a shift range detecting unit; a range switch determining unit determining whether the shift range is switched; a temperature detecting unit; a temperature determining unit determining whether environmental temperature is lower than a predetermined temperature; and a power controlling unit supplying, to the motor, power for setting a maximum value of a rotary torque of rotating the detent lever to be a predetermined value when the shift range is switched and the environmental temperature is lower than the predetermined temperature.

A vehicular control apparatus that includes a switched reluctance motor and an electronic control unit is provided. The switched reluctance motor has a rotor and a stator and is mounted as a travel drive source in a vehicle. The electronic control unit executes current control of the switched reluctance motor. The electronic control unit executes first current control for causing the rotor to rotate in a reverse direction from a rotational direction in which the vehicle is started in the case where the vehicle is not started even when the switched reluctance motor outputs maximum torque within an allowable range, and executes control for causing the rotor to rotate in the rotational direction in which the vehicle is started after the rotor rotates in the reverse direction by the first current control to a rotation position at which torque for enabling a start of the vehicle can be output.

A vehicular control apparatus that includes a switched reluctance motor and an electronic control unit is provided. The switched reluctance motor has a rotor and a stator and is mounted as a travel drive source in a vehicle. The electronic control unit executes current control of the switched reluctance motor. The electronic control unit executes first current control for causing the rotor to rotate in a reverse direction from a rotational direction in which the vehicle is started in the case where the vehicle is not started even when the switched reluctance motor outputs maximum torque within an allowable range, and executes control for causing the rotor to rotate in the rotational direction in which the vehicle is started after the rotor rotates in the reverse direction by the first current control to a rotation position at which torque for enabling a start of the vehicle can be output.

A motor control method according to an embodiment of a present invention comprises the steps of: performing three-phase commutation in a first range section of a motor rotational speed in a brake mode of a motor; performing two-phase commutation in a second range section of the motor rotational speed performing one-phase commutation in a first range section of the motor rotational speed; and turning off commutation when the motor rotational speed is less than or equal to the first range section.

A motor control method according to an embodiment of a present invention comprises the steps of: performing three-phase commutation in a first range section of a motor rotational speed in a brake mode of a motor; performing two-phase commutation in a second range section of the motor rotational speed performing one-phase commutation in a first range section of the motor rotational speed; and turning off commutation when the motor rotational speed is less than or equal to the first range section.