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7D30D-050

7D30D-050资料
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File Size : 116 KB Manufacturer:71 Description:The size and placement of the capacitors for the main voltage bus for the motor will have an effect on the noise filtered through- out the rest of the system. Series RLC tuned circuit is being created by the inductance of the wire (about 30nH per inch), the filter capacitance, and all of the resistances (wire resistance and the capacitor ESR) of the overall power circuit. Voltage spikes from the back EMF if the motor ride on top of the bus voltage. All of this must be taken into account when laying out the system. A first capacitor of high quality and low ESR should be placed as close to the hybrid circuit as possible. Along with that, a capacitor of 5x to 10x the first value should be added (and that second capacitor should have some ESR) and/or a resistor should be added to help with the damping of the volt- age spikes. Be careful of the ripple current in all the capacitors. Excessive ripple current, beyond what the capacitor is rated for, will destroy the capacitor.