Inverter Smoothing Choke

Chang Sung Revolutionizes Block Cores With MegaFlux Technology

2006 – Chang Sung introduced a revolutionary new powder core material based on SiFe technology in a powder form. This combination of materials lead to an extremely high flux density saturation point showing 1600mT. The new material was designed specifically for low voltage high energy storage and high current. The new material, MegaFlux, was the first of it’s kind in the magnetic material industry. It has become the standard material in block forms for high current snllting chokes in inverter circuits for Wind Mills, solar energy, electric vehicle, UPS, welding equipment and many other industries.

Part No.	A	B	C	Al Value (nH/N2)
				026µ	040µ	060µ
BK5315	50.5	30.3	15	95	121	181
BK5320	50.5	30.3	20	130	165	247
BK6315	60.5	30.3	15	79	100	149
BK6320	60.5	30.3	20	107	135	203
BK7315	70.5	30.3	15	67	85	127
BK7320	70.5	30.3	20	91	115	172
BK8315	80.5	30.3	15	58	74	110
BK8320	80.5	30.3	20	78	100	149

Chang Sung Introduces large Toroidal Cores in MegaFlux For Inverter Smoothing Chokes

2010 – Chang Sung introduced the large toroidal cores. These cores are sized specifically for the smoothing chokes in Inverter circuits. The Toroidal cores can be stcked to significantly increase the energy storage of the cores. Here are the current sizes.

Part No.	A	B	C	Al Value (nH/N2)
				026µ	060µ	125µ
CK1013	101.6	57.2	13.6	40	92	192
CK1016	101.6	57.2	16.5	48	112	228
CK1027	101.6	57.2	27.2	80	184	384
CK1033	101.6	57.2	33	94	224	456
CK1320	132.5	78.6	20.3	54	124	259
CK1325	132.5	78.6	25.4	68	156	325
CK1333	132.5	78.6	33	88	202	422
CK1340	132.5	78.6	40.6	108	248	518
CK1650	165	88.9	25.4	80	184	384

Chang Sung Corp Increases Efficiency Of Magnetic Block Material for Inverters

2011 – Chang Sung Corp recently announced an improvement in their MegaFlux block material to increase efficiency of the smoothing chokes in Inverters. The improvement in the block material consists of a 7.5 radius edge creating an Ellipse core. This elliptical core design results in a wider window area and reduction in the number of turns due to (higher DCB).

Advantages of an Ellipse core design

1. Wire length of one (1) turn on an Elipse core decreases the length of wire by 8% when compared to a block core of the same cross sectional area.
2. Window area (Wa) of the Ellipse core is wider when assembled when compared to a cylinder core with the same cross sectional area.
3. Ellipse cores can only be available in powder cores, not in Fe-Si or Amorphous strip cores.

The two core characteristics when considering . . .

. . . DC Bias and Core Loss

The usual powder materials used in block cores is MegaFlux, a powder form of Iron and Silicon, and High Flux, a powder form of Iron and Nickel. There are advantages and disadvantages between the MegaFlux and High Flux. The Ellipse core makes a successful compromise between the two materials.

From the graph 1 below you can see the LK (Ellipse MegaFlux) shows higher DCB (DC Bias) over most of the scale. This gives the advantage to the Ellipse core.

From the Table below, you can also see that the Ellipse core has advantages over the Block core.