Method of driving DC motor and related circuit for avoiding reverse current
AssigneeAnpec Electronics Corporation
InventorsMing-Jung Tsai, Ching-Sheng Li, Kun-Min Chen
Life of this patent
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Abstract
A motor driving method for driving a direct-current (DC) motor, designed for avoiding a reverse current induced by the Back Electromotive Force (BEMF), includes providing a driver circuit for driving the DC motor; comparing a signal level of a terminal of the DC motor and a predetermined voltage value to produce a comparing result; and controlling a specific lower gate switch to avoid the occurrence of a reverse current of the DC motor according to the comparing result.
Claims11
A motor driving method for avoiding occurrence of reverse current induced by Back Electromotive Force, comprising:
- providing a driving current to drive a direct-current (DC) motor;
- comparing a signal level of a terminal of the DC motor with a predetermined voltage value to produce a comparing result;
- and
- controlling a specific lower gate switch to avoid the occurrence of the reverse current of the DC motor according to the comparing result by controlling the current level of the reverse current to approach a predetermined current level while the comparing result indicates that the signal level of the terminal of the DC motor is less than or equal to the predetermined voltage value.
A circuit for driving a direct-current (DC) motor, for avoiding occurrence of reverse current induced by Back Electromotive Force, comprising:
- a power supply unit for providing a driving current to drive a DC motor;
- a comparing unit for comparing a signal level of a terminal of the DC motor with a predetermined voltage value to produce a comparing result;
- and
- a control unit for controlling a specific lower gate switch to avoid the occurrence of the reverse current of the DC motor according to the comparing result by controlling a current level of the reverse current to approach a predetermined current level while the comparing result indicates that the signal level of the terminal of the DC motor is less than or equal to the predetermined voltage value.
Dependencies are inferred from the claim text.