Patent ID: 11929696
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  A | IPC A  H

Claim 5:
6. 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.