• Categories:Technical Support
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• Time of issue:2013-05-27
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(Summary description)(1) What is the difference between the voltage regulation function of the AC module and the transformer?

The transformer can isolate the load from the grid, and transmit equal power according to the set transformation ratio; the AC module is not isolated from the grid and only regulates the grid voltage, and its transmission power is limited by the current and decreases as the voltage decreases.

(2) What is the anti-interference ability of the module?

The module is adapted to the large distortion of the power grid waveform, and can work normally even when the main circuit is working with high current, and the phase-shift trigger control system does not interfere with the connected computer or other control instruments, and has strong anti-interference ability.

(3) What quality assurance does the module have?

Products are produced in strict accordance with the company's technical standards and quality levels. If it is a quality problem of the supplier's product itself, the supplier will replace it within one year of sale.

(4) Will the module generate harmonics when it is working?

The harmonics generated by the module during operation are the same as the traditional thyristor circuit, which will affect the power grid, but according to the user's feedback, the impact on the power grid is relatively small. An example can be taken to illustrate this problem: the ratio of the output power controlled by the module to the power of the grid power transformer is a basis for determining the size of the impact. The grid power transformer has a relatively large capacity and can supply a larger current, while the output power of the module is relatively large compared to the transformer. If the power of the module is relatively small, its impact can be ignored; on the contrary, if the output power controlled by the module is relatively large relative to the power of the transformer, the impact will be relatively large. Power capacitors can be used to absorb when the impact is large, and LC can be used when necessary.

(5) When the module is manually controlled, what are the requirements for the potentiometer used?

The power of the potentiometer is ≥0.5W, and the resistance range is from 5.1 to 100K.

(6) What should be paid attention to when cooling the module?

The junction temperature of the module chip cannot exceed 125 degrees. When the module is working stably, the temperature of the heat sink should not exceed 80 degrees (ie the case temperature of the module), otherwise the module will be burnt out.

(7) When the output of the user test module is abnormal, which aspects should be considered?

1) Whether the module has a load test.

2) Whether the 12V power supply meets the working requirements of the module.

3) If it is controlled by a microcomputer or an instrument, check whether there is a discharge circuit at the control end. Because there is a capacitor on pins 2 and 3 that may store charges, which will turn on when no signal is applied, a 500K resistor must be connected to pins 2 and 3.

4) If the user's test is unbalanced, first check whether the load is balanced, and whether the red and black test leads of the digital meter should be AB, BC, CA phase during the test.

5) Whether the wiring is correct, especially for single-phase AC modules, a neutral wire should be added to both sides.

6) If the module does not work normally when the user has inductive or capacitive load or the load is uncertain, it is recommended that the user test under pure resistive load.

7) When the control signal is uncertain, use potentiometer to adjust to check whether the module is normal.