| 摘要 |
A MOSFET (50, 51) control topology and a physical structure for a motor control which provide a more efficient and economic DC motor control are disclosed. The control topology introduces a synchronous-rectification technique wherein free-wheel diodes are replaced with MOSFET (50, 51) devices that are switched on and off by a logic circuit (38) so that they are conductive for commuting motor current during periods that the motor (24) current supply is switched off. The physical structure and method of assembling a DC motor control (33) eliminate time consuming assembly techniques while ensuring effective waste heat exchange between electronic components (46, 50, 51) and a heat sink (96) of the control (33) by providing quick-install spring retainers (110) for urging the components (46, 50, 51) into heat conducting contact with the heat sink (96). The physical structure also provides for high density packing of electronic components (46, 50, 51) in the control (33). |
