Title:
ELECTRIC MOTOR DRIVE DEVICE AND REFRIGERATION CYCLE APPLICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/180746
Kind Code:
A1
Abstract:
This electric motor drive device (200) comprises a boost circuit (3), an inverter (80), a connection switching device (60), and first and second control devices (8, 100). The boost circuit (3) boosts the voltage value of a bus voltage applied to DC bus lines (12a, 12b). The inverter (80) permits the bus voltage to be applied thereto and applies an AC voltage, the frequency and voltage values of which are variable, to an electric motor (7). The connection switching device (60) switches the connection states of the windings (71, 72, 73) of the electric motor (7). The second control device (100) performs zero current control for controlling the inverter (80) so that the current flowing through the electric motor (7) or the connection switching device (60) becomes zero. When operating the connection switching device (60) and switching the connection states, the second control device (100) performs the zero current control after the boost operation of the boost circuit (3) is stopped by the first control device (8).
Inventors:
SHIMIZU KOYO (JP)
TOYODOME SHINYA (JP)
TOYODOME SHINYA (JP)
Application Number:
PCT/JP2021/007170
Publication Date:
September 01, 2022
Filing Date:
February 25, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P25/18
Domestic Patent References:
| WO2020021681A1 | 2020-01-30 | |||
| WO2019087243A1 | 2019-05-09 | |||
| WO2020016972A1 | 2020-01-23 | |||
| WO2020170379A1 | 2020-08-27 | |||
| WO2020021681A1 | 2020-01-30 |
Other References:
See also references of EP 4300810A4
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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