Motor driving device and motor braking method
AssigneePanasonic Corporation
InventorShuji Tamaoka
Life of this patent
Estimating the term…
Abstract
A motor driving device includes a brake mode control section for starting, when a brake instruction for a motor, braking of the motor in a reverse brake mode and then switching the reverse brake mode to a short brake mode; a cycle start detection section for receiving a rotation signal and detecting a start of a cycle of the rotation signal for each cycle; and a counter for performing, when the start of the cycle of the rotation signal is detected by the cycle start detection section, a count operation from an initial value. In the motor driving device, the brake mode control section detects that a value of the counter exceeds a threshold and performs switching from the reverse brake mode to the short brake mode with a delay from the detection.
Claims9
A motor driving device for driving a motor according to a drive signal generated with one cycle delay from a rotation signal representing detected rotation of the motor, the device comprising:
- a brake mode control section for starting, when receiving a brake instruction for the motor, braking of the motor in a reverse brake mode and then switching the reverse brake mode to a short brake mode;
- a cycle start detection section for receiving the rotation signal and detecting a start of a cycle of the rotation signal for each cycle;
- and
- a counter for performing, when the start of the cycle of the rotation signal is detected by the cycle start detection section, a count operation from an initial value,
- wherein the brake mode control section detects that a value of the counter exceeds a threshold and performs switching from the reverse brake mode to the short brake mode with a delay from the detection.
A motor braking method used in a motor driving device for driving a motor according to a drive signal generated with one cycle delay from a rotation signal representing detected rotation of the motor, wherein braking of the motor is started in a reverse mode and, when a rotation speed of the motor becomes lower than a lower limit value, the reverse brake mode is switched to a short brake mode with a delay from a start timing of a cycle of the rotation signal.
Dependencies are inferred from the claim text.