| 摘要 |
A relay circuit is provided for operating a bi-directional dc motor including an H-bridge relay circuit having a first and a second relay. The first relay is capable of operatively engaging a first contact at a first time period to provide a first connection of the motor to a power source to operate the motor in a first mode. The second relay is capable of operatively engaging a second contact at a second time period to provide a second connection of the motor to the power source to operate the motor in a second mode. The relay circuit further includes a switch having at least one contact operatively engaging the first or second relay for effectuating the first or second connection, respectively. A third relay is operatively associated with the switch to provide a third connection of the motor to the power source as the at least one contact operatively engages the first or second relay. The third connection is disconnected prior to disconnection of the first or second connection as the at least one contact disengages the first or second relay. |
