Patent ID: 9577551
Date: 2017-02-21
CPC Classifications: H02P

Claim:
1. A motor drive apparatus that controls a current flowing through a coil of a motor, comprising: a comparing section that compares the current flowing through the coil to a control current input thereto; an operation selecting section that selects an operational state from among a drive state, a regenerative state, and a braking state, according to a comparison result of the comparing section; a driving section that receives a designation signal designating a current mode that includes a conductive mode in which the current flows through the coil and a stop mode in which the current flowing through the coil is stopped, drives the coil in the operational state selected by the operation selecting section when the designation signal designating the conductive mode is received, and drives the coil in the braking state when the designation signal designating the stop mode is received; and a setting section that controls a start of the designation signal designating the stop mode or a start of a period during which the control current is zero.