CPC H02P 7/063 (2013.01) [H02P 7/29 (2013.01)] | 17 Claims |
1. A speed controller for determining and controlling operation speeds of a motor, the speed controller comprising:
a processor operable to send control signals and receive feedback signals;
a base voltage terminal electrically connected to the processor and receiving a base voltage U+;
a first voltage terminal electrically connected to the processor and provided with a constant voltage;
a second voltage terminal electrically connected to the processor and receiving a first motor coil voltage U2 determined by the processor; and
a third voltage terminal electrically connected to the processor and receiving a second motor coil U3 voltage determined by the processor;
wherein the processor provides a first control period T1 having the second motor coil voltage of the third voltage terminal be zero and a second control period having the first motor coil voltage U2 of the second voltage terminal be zero, and wherein the processor determines a rotation speed of the motor by controlling a value difference between a first time period t1 in the first control period T1 and a second time period t3 in the second control period, the first time period t1 corresponding to a first increase in an output voltage U0 and the second time period t3 corresponding to a second increase in the output voltage U0,
wherein the output voltage Uo, the base voltage U+ constant voltage U1, the first motor coil voltage U2, and the second motor coil voltage U3 satisfy the following relationship:
wherein CF is a value of a capacitor in an amplifier integrator circuit and R1, R2, and R3 are values of respective resistors between the first voltage terminal, the second voltage terminal and the third voltage terminal and the amplifier integrator circuit.
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