Control device for rotating electrical machine

摘要

According to typical examples, the first stator winding having the lower rated voltage is connected to the second direct-current voltage source only when the rotation speed of the rotating electrical machine becomes high. Therefore, output in a high-rotation range can be ensured while preventing the second stator winding from reaching a heat-generation limit. Furthermore, such switching operations can be actualized by the first switch and the second switch. Therefore, a control device of a rotating electrical machine can be actualized by a relatively simple configuration.

主权项

1. A control device of a rotating electrical machine, wherein the control device is provided with a first stator winding and a second stator winding that has a greater rated voltage than the first stator winding, the first stator winding and the second stator winding being insulated from each other, comprising:
a first inverter that is connected to the first stator winding; a second inverter that is connected to the second stator winding; a controller that operates the first inverter and the second inverter to control a current and voltage of the rotating electrical machine; a first switch for switching a first state and a second state, wherein the first state is a state that the first inverter and the second inverter is electrically connected to a second direct voltage source, and the second state is a state that only the second inverter is electrically connected to the second direct voltage source; and a second switch for connecting or disconnecting the first inverter to and from a first direct-current voltage source whose terminal voltage is lower than that of the second direct-current voltage source; wherein the controller performs i) an operation to switch the first switch to an open state and switch the second switch to a closed state when a rotation speed of the rotating electrical machine is low, and ii) an operation to switch the first switch to a closed state and the second switch to an open state when the rotation speed of the rotating electrical machine becomes high.