U1B-M3/5AT

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U1B-M3/5AT Application Field and Working Principle

U1B-M3/5AT is a type of diode-rectifier and a single-phase full-controlled bridge rectifiers. It is widely used in controllable DC power supply, motor speed control, soft starter, lighting dimming, elevator control, voltage-stabilized power supply, etc. It can achieve response frequency up to 15kHz, provide stable output voltage, and the maximum temperature rise of each component is 40K.

Application Field

U1B-M3/5AT diode-rectifiers are suitable for use in various applications due to their high current rated operation, low voltage operation and good heat dissipation. These are suitable for polarity sensitive applications such as soft starter, electromagnetic start and stop, speed control and stepless dimming. It is also applicable in applications requiring fast frequency response. The output voltage can be stably controlled in the range of 0-10V and the pulse width can be optimally adjusted for the best performance.

The U1B-M3/5AT diode-rectifier is particularly suitable for applications where high output voltage accuracy is needed. In some instances, it can be used as a direct replacement for other types of rectifiers as its output voltage will remain almost consistent even with varying input or load current. This reduces the frequency of adjustment and increases process accuracy.

Working Principle

The U1B-M3/5AT rectifier uses two power transistors Q1 and Q2 in place of the typical diode pairs. In order to obtain a stable output voltage, the two power transistors Q1 and Q2 are connected to the supply line. For inputs, the power transistors Q1 and Q2 will switch on and off alternately, providing an AC voltage that is rectified into DC voltage. During the conduction period of the power transistors, the inductor provides a condition of a DC circuit and is thus used to further filter the output current.

The U1B-M3/5AT can maintain a stable output voltage even when load or input current changes significantly. This is thanks to the combination of its high frequency switching, low ON-resistance of the transistors, and active control of the output voltage.

Conclusion

In conclusion, the U1B-M3/5AT single-phase full-controlled bridge rectifier is a great choice for various applications due to its combination of high frequency switching and active control of output voltage. It also provides a high level of current rated operation and good heat dissipation, making it suitable for use in polarity sensitive applications such as soft starter, electromagnetic start and stop, speed control and stepless dimming.

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