Driving and resistance control system for permanent-magnet synchronous motor

A driving and resistance control system for driving a permanent-magnet synchronous motor or applying a resisting force to the permanent-magnet synchronous motor, the permanent-magnet synchronous motor comprising a stator and an external rotor, wherein the stator includes a plurality of stator windings, and the external rotor is provided with a plurality of permanent magnet units circumferentially arranged therearound, and the external rotor is combinable with a flywheel of an exercise equipment, comprising:

• a power supply circuit for supplying an electrical energy;
• an electromagnetic resistance generation device arranged adjacent to the external rotor of the permanent-magnet synchronous motor;
• and
• a control device, comprising:
• a processing unit;
• a motor driving circuit electrically connected with the power supply circuit and the plurality of stator windings of the permanent-magnet synchronous motor to drive the permanent-magnet synchronous motor;
• a resistance controller connected between the plurality of stator windings of the permanent-magnet synchronous motor and the electromagnetic resistance generation device;
• and
• an interlock switch connected with the motor driving circuit, the permanent-magnet synchronous motor, and the resistance controller;
• wherein in a first operation mode, the interlock switch makes the motor driving circuit and the plurality of stator windings of the permanent-magnet synchronous motor open-circuiting, and makes the plurality of stator windings of the permanent-magnet synchronous motor connected to the resistance controller, and under such a condition, the external rotor of the permanent-magnet synchronous motor is caused to rotate by an operator applying a force to cause spinning of the flywheel, so that the permanent-magnet synchronous motor is operating in a generator mode to make the plurality of stator windings generate a generation voltage fed to the resistance controller, and the resistance controller changes an electromagnetic field intensity of the electromagnetic resistance generation device according to a pulse width modulation (PWM) control signal so as to change a magnitude of a resisting force acting on the flywheel;
• and
• in a second operation mode, the interlock switch makes the motor driving circuit and the plurality of stator windings of the permanent-magnet synchronous motor closed-circuiting, and cutting off control of the resistance controller, and the power supply circuit supplies electrical energy to the permanent-magnet synchronous motor through the motor driving circuit, so as to make the permanent-magnet synchronous motor operating in a motor mode to include an acceleration on the external rotor of the permanent-magnet synchronous motor.

A driving and resistance control system for driving a permanent-magnet synchronous motor or applying a resisting force to the permanent-magnet synchronous motor, the permanent-magnet synchronous motor comprising a stator and an external rotor, wherein the stator includes a plurality of stator windings, and the external rotor is provided with a plurality of permanent magnet units circumferentially arranged therearound, and the external rotor is combinable with a flywheel of an exercise equipment, comprising:

• an energy storage device;
• a resistance generation device for generating a resisting force to the flywheel of the exercise equipment;
• a control device, comprising:
• a processing unit;
• a motor driving circuit electrically connected with the energy storage device and the plurality of stator windings of the permanent-magnet synchronous motor to drive the permanent-magnet synchronous motor;
• a resistance controller connected between the plurality of stator windings of the permanent-magnet synchronous motor and the resistance generation device;
• and
• an interlock switch including a first switch and a second switch, the first switch being connected with the motor driving circuit and the plurality of stator windings of the permanent-magnet synchronous motor and the second switch being connected between the plurality of stator windings and the resistance controller;
• at least one electricity generation winding wound onto the stator;
• and
• a charging circuit connected to the at least one electricity generation winding through a second rectifier and filter circuit and connected to the plurality of stator windings through the resistance controller;
• wherein in a first operation mode, the interlock switch makes the motor driving circuit and the plurality of stator windings of the permanent-magnet synchronous motor open-circuiting, and makes the plurality of stator windings of the permanent-magnet synchronous motor connected to the resistance controller, and under such a condition, the external rotor of the permanent-magnet synchronous motor is caused to rotate by an operator applying a force to cause spinning of the flywheel, so that the permanent-magnet synchronous motor is operating in a generator mode to make the plurality of stator windings generate a generation voltage fed to the resistance controller, and the resistance controller controls the resistance generation device to generate the resisting force to the flywheel according to a pulse width modulation (PWM) control signal;
• wherein the generation voltage generated by the plurality of stator windings charges into the energy storage device through the resistance controller and the charging circuit during the first operation mode, and also a backward charging voltage generated by the at least one electricity generation winding charges into the energy storage device through the second rectifier and filter circuit and the charging circuit during the first operation mode;
• wherein in a second operation mode, the interlock switch makes the motor driving circuit and the plurality of stator windings of the permanent-magnet synchronous motor closed-circuiting, and cutting off control of the resistance controller, and an electrical energy stored in the energy storage device is supplied to the permanent-magnet synchronous motor through the motor driving circuit, so as to make the permanent-magnet synchronous motor operating in a motor mode to drive the external rotor of the permanent-magnet synchronous motor;
• and
• wherein a backward charging voltage generated by the at least one electricity generation winding charges into the energy storage device through the second rectifier and filter circuit and the charging circuit during the second operation mode.