Title:
モータ駆動装置
Document Type and Number:
Japanese Patent JP5333503
Kind Code:
B2
Abstract:
In a motor driving device, a driving switching element is connected in series with a motor between a power source and a ground, and operated by a PWM signal outputted from a control circuit. A return current path forming unit is connected in parallel with the motor to allow a return current when the driving switching element is turned off. A series circuit of a current flow restriction element and a switch is connected in parallel with the return current path forming unit. A disconnection determination unit prohibits output of the PWM signal and closes the switch of the series circuit when a voltage applied to the motor does not fluctuate according to the PWM signal, and determines the disconnection of the motor on condition that the voltage detected in that state indicates a change across a second threshold.
Inventors:
Hiroki Iwamiya
Application Number:
JP2011082713A
Publication Date:
November 06, 2013
Filing Date:
April 04, 2011
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H02P7/29; H02P7/291
Domestic Patent References:
| JP2010100112A | ||||
| JP20015521A | ||||
| JP6489993A | ||||
| JP63154095A |
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office
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