| 摘要 |
<p>A power controller comprises at least one switching circuit, consisting of a first switching element, such as a MOSFET, a second switching element, such as a diode D-FW and a capacitor CAP, and a printed circuit board PCB having the switching circuit(s) arranged around an inner area of the board in a partial or complete loop, the inner area of the board and the area outside the loop being substantially solid tracking or conductive areas forming connections to the switching circuit(s). A further aspect relates to a power controller comprising a switching circuit consisting of a first switching element MOSFET, a second switching element D-FW, and a capacitor CAP mounted on a printed circuit board PCB with the first and second switching elements mounted on one side of the board and the capacitor on the other. The MOSFET, diode and capacitor circuits are arranged in four sets, one set along each side of the board. Connectors A, B+ and B- are located along a diagonal of the board, with the connectors A and B+ to the two sides of the diodes located at opposite corners of the inner areas of the board. The inner tracking areas are divided by isolating lines into separate fingers for the respective circuits. A heat sink bar (31, Fig 5) of aluminium is connected between the MOSFET and diode of each circuit. Motor operating circuits using the power controller are described (Figs 1 and 6).</p> |
