Title:
電動機駆動装置及び冷凍サイクル適用機器
Document Type and Number:
Japanese Patent JP7387056
Kind Code:
B2
Abstract:
An electric motor drive device includes a booster circuit, an inverter, a connection switching device, and first and second control devices. The booster circuit boosts a voltage value of a bus voltage to be applied to a DC bus. The bus voltage is applied to the inverter, and the inverter applies an AC voltage having a variable frequency and a variable voltage value to an electric motor. The connection switching device switches a connection state of windings of the electric motor. The second control device performs zero current control to control the inverter such that a current flowing through the electric motor or the connection switching device is zero. When operating the connection switching device to switch the connection state, the second control device performs the zero current control after a boosting operation of the booster circuit is stopped by the first control device.
Inventors:
Kohyo Shimizu
Shinya Toyodome
Shinya Toyodome
Application Number:
JP2023501924A
Publication Date:
November 27, 2023
Filing Date:
February 25, 2021
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P25/18
Foreign References:
| WO2020021681A1 | ||||
| WO2019087243A1 | ||||
| WO2020016972A1 | ||||
| WO2020170379A1 |
Attorney, Agent or Firm:
Jun Takamura
Previous Patent: Quick lock change assembly and locking device using it
Next Patent: Refrigeration cycle equipment
Next Patent: Refrigeration cycle equipment