POWER TOOL AND MOTOR DRIVE SYSTEM THEREOF
First Claim
1. A motor drive system, comprising:
- an inverter comprising an upper-half bridge and a lower-half bridge, wherein each of the upper-half bridge and the lower-half bridge comprises at least two semi-conductive switch elements, and the inverter is configured to convert a voltage provided by a power supply to an alternating current to drive a motor;
a microcontroller configured to output a drive signal to the alternately turn on each two of the at least two semi-conductive switch elements of the upper-half bridge and each two of the at least two semi-conductive switch elements of the lower-half bridge when the motor performs braking, whereby a motor winding and the turned-on semi-conductive switch elements form a circuit; and
a capacitor configured to supply power to the microcontroller when the motor performs braking.
1 Assignment
0 Petitions
Accused Products
Abstract
A motor drive system is provided, which includes: an inverter including an upper-half bridge and a lower-half bridge, the upper-half bridge and the lower-half bridge each including at least two semi-conductive switch elements, where the inverter is configured to convert a voltage provided by a power supply to an alternating current to drive a motor; a microcontroller configured to output a drive signal to the alternately turn on each two of the at least two semi-conductive switch elements of the upper-half bridge and each two of the at least two semi-conductive switch elements of the lower-half bridge when the motor performs braking, whereby a motor winding and the turned-on semi-conductive switch elements form a circuit a capacitor configured to supply power to the microcontroller when the motor performs braking.
5 Citations
14 Claims
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1. A motor drive system, comprising:
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an inverter comprising an upper-half bridge and a lower-half bridge, wherein each of the upper-half bridge and the lower-half bridge comprises at least two semi-conductive switch elements, and the inverter is configured to convert a voltage provided by a power supply to an alternating current to drive a motor; a microcontroller configured to output a drive signal to the alternately turn on each two of the at least two semi-conductive switch elements of the upper-half bridge and each two of the at least two semi-conductive switch elements of the lower-half bridge when the motor performs braking, whereby a motor winding and the turned-on semi-conductive switch elements form a circuit; and a capacitor configured to supply power to the microcontroller when the motor performs braking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification