One of the common requirements of a power supply design is that it presents a “real” load to AC mains. For example, PG&E Industrial customers with a peak demand over 400kW will be penalized if their power factor is below 85%. Power Factor Power factor is the ratio between the DC equi...
An improved power factor DC power supply in accordance with the present invention (100 or 200) employs a power factor correcting network (120), a full-wave rectifier means (122), a pair of filter capacitors (124 and 126), and three current steering diodes (128, 130 and 132). The power...
Moreover users can set some parameters such as power factor upper limit limit and so on. 同时用户可根据需要设定功率因数上、下限,过电压值等参数. 互联网 The movement of reactive power influences the power factor and power supply quality. 无功功率的变化直接影响着用户的功率因数及供电电压质量. 互联...
In a power supply with a boost pre-regulator and power factor correction devices the voltage induced in an auxiliary winding magnetically coupled to the inductor of the pre-regulator and rectified by a diode bridge charges an integrating capacitor, shunted by a discharging resistor, to a voltage...
As the name implies,active power factor correction(APFC) employs a circuit that actively corrects the power factor. As we just explained, the power factor is an important parameter in the world of PSUs, since it describes the ratio between effective power and apparent power:Pros:• An almost...
The device is designed to provide, from a three phase system, a DC supply to a load. In each of the three phases is a bridge rectifier (A1, A2, A3) followed by a power factor correction unit (B1, D1, E1, F1; B2, D2, E2, F2; B3, D3, E3, F3), and a controlled DC-DC...
Uninterruptible power supply 不间断电源 Power factor 功率因数 Spot power price 实时电价 Tap 分接头 Recovery voltage 恢复电压 Rms (root mean square) 均方根值 Operation mechanism 操作机构 Nameplate 铭牌 Independent pole operation 分相操作 LED (light emitting diode) 发光二极管 ...
When the power factor is 1, all the energy supplied by the source is consumed by the load. Power factors are usually stated as "leading" or "lagging" to show the sign of the phase angle. If a purely resistive load is connected to a power supply, current and voltage will change ...
Power supply device A PFC (Power Factor Correction) circuit improves the power factor of rectified power. Upon receiving output of the PFC circuit, a first DC-DC converter generates a voltage to be supplied to a load. Upon receiving output of the PFC circui... S Yamashita,T Ohno,K Watana...
SOLUTION: By stopping switching operation performed by a power factor improvement circuit 51 connected between a power input terminal 15 of the switching power supply 2 and a DC/DC conversion circuit 52, or by bypassing the power factor improvement circuit 51, a power input from the power input...