Patent ID: 11962257
Assignee: MAKITA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  Y | IPC F  H

Claim 17:
18. The blower according to claim 3,
wherein the motor drive circuit includes:
a voltage measurement circuit configured to measure a value of a voltage, the voltage being applied to the motor;
a current measurement circuit configured to measure a value of an electric current, the electric current flowing through the motor;
a multiplier configured to receive (i) the value of the voltage measured by the voltage measurement circuit and (ii) the value of the electric current measured by the current measurement circuit and to produce a product thereof, the product corresponding to the magnitude of the electric power delivered to the motor;
a switching signal generator configured (i) to receive the product and the power designating signal and (ii) to generate a switching signal; and
a bridge circuit configured (i) to receive the switching signal and (ii) to drive the motor based on the switching signal received.