Title:
CUT-OFF CIRCUIT DIAGNOSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/239753
Kind Code:
A1
Abstract:
This cut-off circuit diagnostic device is provided with a motor control module that controls a motor and an external safety module that can be attached to and detached from the motor control module. The motor control module is provided with: a motor driving unit that has an inverter circuit for controlling the voltage applied to the motor by means of PWM control and a driving circuit for driving a power component of the inverter circuit; and a first cut-off circuit diagnostic unit which has a cut-off circuit for cutting off a power supply to the driving circuit and a first diagnostic pulse generator for generating a first signal to control the cut-off by the cut-off circuit and which detects whether or not the power supply to the driving circuit is cut off according to the first signal. The external safety module is provided with a second cut-off circuit diagnostic unit which has a second diagnostic pulse generator for generating a second signal to control the cut-off by the cut-off circuit and which detects whether or not the power supply to the driving circuit is cut off according to the second signal. Also, the motor control module is provided with a function switching unit that supplies the second signal to the cut-off circuit when the external safety module is mounted on the motor control module, and supplies the first signal to the cut-off circuit when the external safety module is not mounted on the motor control module.
Inventors:
KISHIDA HIDEYUKI
KISHIBE TARO
KISHIBE TARO
Application Number:
PCT/JP2019/018654
Publication Date:
December 19, 2019
Filing Date:
May 10, 2019
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02P27/08; G05B9/02
Domestic Patent References:
| WO2015063892A1 | 2015-05-07 | |||
| WO2017013722A1 | 2017-01-26 | |||
| WO2017216938A1 | 2017-12-21 |
Foreign References:
| JP2015062970A | 2015-04-09 | |||
| JP4202335B2 | 2008-12-24 |
Other References:
See also references of EP 3809583A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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