Motor drive device
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United States of America Patent
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Jul 23, 2020
Grant Date -
Jul 23, 2020
app pub date -
Jul 26, 2017
filing date -
Jul 26, 2017
priority date (Note) -
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Abstract
A motor drive device capable of switching the connection configuration of the stator windings of a motor includes three relays each including a first contact, a second contact, and a contact plate, where the contact plate has one terminal coupled to a stator winding of one phase among the stator windings and the contact plate has another terminal to be connected to the first contact or to the second contact; and a control unit to control the three relays to cause all the three relays to have a same connection state in a case in which not all the three relays have a same connection state with respect to connections between the another terminal of the contact plate and the first contact and the second contact.
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