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PROGRAMMABLE POWER SUPPLY APPLICATION

the battery load application:

When the DC power supply is used to charge the battery type load, in order to prevent the power supply from being damaged due to the polarity of the battery, a diode should be connected in series between the power supply and the battery to protect the safe use of the DC power supply. 

the load application that will generate reverse current:

When the motor connected to the output of the DC power supply suddenly brakes, a large reverse current is generated. Since the DC power supply cannot absorb the reverse current generated from the load terminal, the output voltage rises. The solution is to connect a diode in series between the output of the DC power supply and the load, and connect a bleeder resistor to the load to absorb the reverse current. When the reverse current is a spike, connect a large-capacity electrolytic capacitor to both ends of the load.

the battery load application:

When the DC power supply is used to charge the battery type load, in order to prevent the power supply from being damaged due to the polarity of the battery, a diode should be connected in series between the power supply and the battery to protect the safe use of the DC power supply. 

Inductive load applications:

When switching the DC power supply or changing the output voltage, the inductive load will cause the reverse induced electromotive force to affect the DC power supply, and even cause damage to the DC power supply.At this time, a diode is connected in series between the output end of the DC power supply and the load, and an RC absorption circuit composed of a power resistor and a capacitor is connected in parallel at the load end to effectively protect the DC power supply.

Pulse load application:

The peak current of the pulse type load is within the range of the rated current value of the DC power supply output, or the pulse current circuit or the motor drive circuit load current waveform, within the nominal value (average value) indicated by the metering device.The current also reaches the DC power supply rated current region, causing the output voltage to drop or appear unstable.The solution is to connect the inductor in series with the power supply and the load, or to select a DC power supply with a larger output current.
According to the working mode of the programmable power supply, it can be mainly divided into four categories: constant voltage output mode, constant current output mode, series mode, parallel mode and the like.The constant voltage output mode means that the output of the current changes with the load in order to keep the output voltage constant.
The constant current output mode means that the output of the voltage changes with the load in order to keep the output current stable.
In series mode, the line is in series mode, and the currents of all devices in the line are equal;
Parallel mode means that the currents of the lines add up to be equal to the total current when the voltages are the same.
Programmable power supplies have many functions, such as tracking, sensing, arbitrary waveform, modulation, and so on.In some programmable power supplies, we implant some inter-channel linkage function,it's tracking function. When our pre-set voltage is consistent with the voltage it is circulating, the system will work normally, but when The circulating voltage fluctuates up and down, and when it fluctuates to the preset limit, it will automatically feed back to the equipment, and the equipment will make corresponding power-off measures.Induction means that in order to keep the voltage of the load stable, we load the voltage through the wire on the load. For a more efficient output power supply, it is equal to the sum of the line voltage drop and the required load voltage.Arbitrary waveform refer to the ability of some programmable power supplies to have arbitrary waveform editing that can change waveform over time. Modulation refers to some programmable power supplies that can be modulated by the terminals on the rear panel regardless of the power.
HIGH FREQUENCY INVERTER FEATURES
 Wide input voltage range, high voltage regulation accuracy and strong environmental adaptability;
 using dedicated microprocessor control, digital technology, international leading;
 pure sine wave output, excellent electrical performance indicators;
 LED + LCD liquid crystal display, friendly man-machine interface, intuitive and convenient, can display the inverter working state, load status, environmental status and parameters at any time;
 Arbitrarily choose bypass priority or inverter priority;
 the input and output electrical isolation, can withstand the impact of computer load surge;
 efficient inverter, low no-load loss;
  Advanced manufacturing technology and generous appearance;
 with input over, under voltage, reverse protection; output overload, short circuit protection; high voltage and low voltage of the mains bypass;
  in the absence of DC, you can AC start-up;
 fully automated maintenance, for unattended aircraft stations.
THE DIFFERENCE BETWEEN HIGH FREQUENCY INVERTER AND LOW FREQUENCY INVERTER
According to the spectrum allocation table established by the Institute of Electrical and Electronics Engineers (IEEE), the low frequency is 30~300kHz, the intermediate frequency is 300~3000kHz, the high frequency is 3~30MHz, and the frequency range is 30~300MHz. It is UHF at 300~1000MHz. Compared with the low frequency signal, the high frequency signal changes very fast and has abrupt changes; the low frequency signal changes slowly and the waveform is smooth.

 
The power supply is not the same as the signal. The voltage supplied by the power board is generally 0 (DC power supply) or 50 Hz (AC power). The signal can be said to be high frequency or low frequency (or other frequency), the power board is not good to display, because it is only used to supply power, the frequency is very low, it must be said that it is only low frequency.



 
The advantages of the high-frequency inverter are mainly light weight, small size, low standby power, and high efficiency (relatively saving power).The disadvantage is that the impact resistance is not as good as the power frequency inverter (low frequency), and may not bring food appliances such as food mixers and hand drills. The shortcomings of low frequency are relatively heavy, relatively large, and the price may be slightly more expensive, The loss itself will be slightly larger (a little power). The advantage is that it is more sturdy and will have better impact with impacting appliances.

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