Voltage stabilizer AC inverter circuit Rationale

The DC circuit is called reverse into AC inverter circuit. In certain cases, the same set mcb circuit breaker‍ of thyristor rectifier circuit can make, but for the inverter.

The converter operates in inverter state voltage stabilizer‍, if the converter is connected to the AC side of the AC power to DC to AC inverter with a frequency counter to the grid to go, called active inverter. If the change is not the AC side current grid connection, but directly to the load, which converts DC to a certain frequency or adjustable frequency alternating current supplied to the load, then called passive inverter. AC frequency control is the use of CNC Electric‍ this principle. Except for the DC reversible active inverter speed control system, but also for AC induction motor rotor Rao line cascade control and other aspects of HVDC.

2 relative concept

Convert alternating current to direct current approach is rectified; and convert DC to AC inverter method.

Rectification, full-wave rectifying circuit is the use of one-way conduction of the diode characteristics, with four diodes connected into a bridge rectifier circuit voltage stabilizer‍, the input terminal is an AC current, the waveform is a sine wave, the direction of the alternating current, and an output terminal waveform current becomes the same direction, AC Contactors‍ and then through a filter circuit to obtain a DC waveform after filtered.

electric energy meter Inverter Classification

Source inverter also has passive inverter. For example, the DC voltage, through a simple, single-phase thyristor bridge type H, H is the output of the cross on each of the electric meter‍ four H's vertical thyristor, electric energy meter, at 34, 14 and 23 were opened to give a positive negative separated the output voltage and current.

The pulse width modulation inverter technology

Basic square wave inverter circuit is simple, but the output voltage waveform harmonic content is too large, but also both the THD (current harmonic distortion) is too large; the phase shift of multiple superimposed small harmonic content inverter output voltage waveform, That THD is small, but the circuit is more complex. The PWM pulse width modulation inverter, both the computer's circuitry, and the output voltage waveform, which has been widely used.

The so-called PWM technology (Pulse Width Modulation, PWM), is made of a reference wave (usually a sine wave, sometimes with a trapezoidal wave or injected zero sequence harmonic Electric transformer‍ sine wave or square wave, etc.) for the modulation wave (electric energy meter), and to N times the frequency of the modulation wave of the triangular wave (sawtooth wave is also sometimes used) of the carrier (Carrier Wave) waveform comparison, the modulation wave is greater than the carrier portion to generate a set of equal amplitude and a width proportional to the modulated waves equivalent rectangular pulse sequence is used to modulate the wave instead of using analog switch, and through the inverter power switch on / off control, the DC power into AC power, this technique is called pulse control inverter technology. Because triangular carrier wave (or sawtooth) vertical section is a linearly varying degrees, so this technique is called pulse control inverter technology. Since the triangular carrier wave (or sawtooth) is vertical width is linear, so that this modulation is linear, when the modulation wave is a sine wave, a rectangular pulse width of the output pulse train changes sinusoidally, this modulation Air circuit breaker‍ technique typically also known as the sinusoidal pulse width modulation (Sinusoida PWM) technology.

Voltage stabilizer Inverter FAQ

u outside interference

The inverter may be due to a number of occasions in the strong electromagnetic interference, such as motors, power inverter, a strong magnetic field in the vicinity.

Far away from the device similar to circuit breakers‍ the above.

u inverter does not respond

1. Battery and the inverter is not connected, reconnect.

2. Battery pole reversed, the fuse is blown. Replace the fuse.

u output voltage is low

1. Overload, load current exceeds the nominal current, turn off some of the load restart.

2. Input voltage is too low. Ensure input Cncelegroup‍ voltage is within the nominal voltage range.  

electric energy meter Inverter include:

Dedicated power inverter

Communications for power inverter   

Frequency inverter powered

Industrial sine wave inverter

Square wave inverter

The role and characteristics of medical Inverter

Due to a variety of different types of medical equipment supply needs, use the most is the centralized power structure. I.e., by a power converter to produce the desired concentration of various voltage air circuit breaker‍ levels of the output voltage. Due to its low cost, high efficiency, adjustable output voltage electric energy meter, low output noise, fast dynamic response and other type of equipment is very suitable for medical use, is a medical device is currently the most used type of a power supply. Medical equipment supply program to determine the need to consider the following questions.

Security and isolation is a major difference between the ordinary commercial power and medical supply. Typically, in addition to some experimental analysis class equipment, medical equipment mostly installed near the bed or the operating table, and the operator's distance from the more recent, the shell will often be Circuit Breakers  ‍touched. There are a variety of medical equipment inside the strong, weak parts, if the strength of electrical isolation between the insulated shell material or have a problem, it will be very dangerous. General medical equipment safety testing power supplies must be UL60601-1, C-UL, EN60601-1 safety certification. Inputs and outputs must be more than 4,000V isolation voltage, and low leakage current requirements to meet safety creepage distance requirements. And part of the need for a strong electric double insulation, especially some of them might be more in contact with the enclosure designed to enhance insulation.

Electromagnetic compatibility and immunity to electromagnetic interference

Select the type of equipment to be medical or build a good power supply system must focus on improving the supply of electromagnetic compatibility and electromagnetic interference. CNC Electric‍ Mainly from the following aspects to consider: design. PCB design and layout, in general will contain some of the high frequency power signal, any traces on the PCB can be functioned as an antenna, the length and width of the printed lines will affect the resistance and inductance, thus affecting the frequency respond in a timely manner will be coupled to the RF signal and cause problems through the circuit traces DC signal from adjacent tracks. Medical power supply must be selected so that the big brands, has a strong R & D strength of the company's products, which in the design and production processes can ensure good quality.

Shield

In order to suppress the switching power supply generated by radiation, eliminate the influence of electromagnetic interference from other electronic devices in the medical equipment electric energy meter‍, the best way is to supply the magnetic shield, the shield and then the entire cabinet or medical Power Transformer‍ devices to a single entity, this is a more effective approach.

electric energy meter Rationale

The DC circuit is called reverse into AC inverter circuit. In certain cases, the same set of thyristor rectifier circuit can make, but for the inverter.

The converter operates in inverter state, if the CNC Electric‍ converter is connected to the AC side of the AC power to DC to AC inverter with a frequency counter to the grid to go, called active inverter. If the change is not the AC side current grid connection, but directly to the load, which converts DC to a certain frequency or adjustable frequency alternating current supplied to the load, then called passive inverter. AC frequency control is the use of this principle. Except for the DC reversible active inverter speed control system, but also for AC induction motor rotor Rao line cascade control and other aspects of HVDC.

2 relative concept

Convert alternating current to direct current approach is rectified; and convert DC to AC inverter method.

Rectification, full-wave rectifying circuit is the use of one-way conduction of the diode characteristics, with four diodes connected into a bridge rectifier circuit, the input terminal is an AC power transformers‍ current, the waveform is a sine wave, the direction of the alternating current, and an output terminal waveform current becomes the same direction, and then through a filter circuit to obtain a DC waveform after filtered.

Voltage stabilizer Inverter Classification

Source inverter also has passive inverter. For example, the DC voltage, through a simple, single-phase thyristor bridge type H, H is the output of the cross on each of the four H's vertical thyristor, No. 12, at 34, 14 and 23 were opened to give a positive negative separated the output voltage and current.

The pulse width modulation inverter technology

Basic square wave inverter circuit is simple, AC Contactors‍ but the output voltage waveform harmonic content is too large, but also both the THD (current harmonic distortion) is too large; the phase shift of multiple superimposed small harmonic content inverter output voltage waveform, That THD is small, but the circuit is more complex. The PWM pulse width modulation inverter, both the computer's circuitry, and the output voltage waveform, which has been widely used.

The so-called PWM technology (Pulse Width Modulation, PWM), is made of a reference wave (usually a sine wave, sometimes with a trapezoidal wave or injected zero sequence harmonic sine wave or square wave, etc.) for the modulation wave (Modulating wave), and to N times the frequency of the modulation wave of the triangular wave (sawtooth wave is also sometimes used) of the carrier (Carrier Wave) waveform comparison, the modulation wave is greater than the carrier portion to generate a set of equal amplitude and a width proportional to the modulated waves equivalent rectangular pulse sequence is used to modulate the wave instead of using analog switch, and through the inverter power switch on / off control, the DC power into AC power, this technique is called pulse control inverter technology. Because triangular air circuit breaker‍ carrier wave (or sawtooth) vertical section is a linearly varying degrees, so this technique is called pulse control inverter technology. Since the triangular carrier wave (or sawtooth) is vertical width is linear, so that this modulation is linear, when the modulation wave is a sine wave, a rectangular pulse width of the output pulse train changes sinusoidally, this modulation technique typically also known as the sinusoidal pulse width modulation (Sinusoida PWM) technology.

Inverter FAQ

u outside interference

The inverter may be due to a number of occasions in the strong electromagnetic interference, such as motors, power inverter, a strong magnetic field in the vicinity.

Far away from the device similar to the above.

u inverter does not respond

1. Battery and the inverter is not connected, reconnect.

2. Battery pole reversed, the fuse is blown. Replace the fuse.

u output voltage is low

1. Overload, load current exceeds the Circuit Breakers‍ nominal current, turn off some of the load restart.

2. Input voltage is too low. Ensure input voltage is within the nominal voltage range.‍

u low voltage alarm

1. The batteries need to be recharged.

2. Battery voltage is too low or bad, recharge, check the battery terminals, or with a dry cloth to clean the terminals.
u no the inverter output
1. Battery voltage is too low Air circuit breaker to recharge or replace the battery.
2. Load current is too high, the closure of some load restart inverter.
3. Inverter over-temperature protection. Let inverter cool for some time, and well ventilated place.
4. The inverter fails to start, restart.
5. Terminals reversed, the fuse is blown, replace the fuse.
u inverter does not work
Check the power switch, fuses and battery cable or cigarette lighter.
Inverters DC input
The reason of such failure often happens is the battery is not connected properly, positive and negative terminals of the inverter must be connected correctly and battery positive and negative, positive then positive, then negative negative, right after connecting the switch is closed, basically you can solve such malfunction.
Inverter input and output fuse
Such failures are generally apparent power transformers that, as long as you can replace the fuse.
Battery voltage is higher than the nominal DC input voltage of 20%
The inverter has an operating voltage range, typically rated DC voltage of + -10%, should the higher the voltage, the need to replace batteries or replace the inverter in order to prevent damage to the machine.
Battery voltage is lower than the nominal DC input voltage of 15%
Such problems are mainly due to lack of battery power, you can just give the battery pack.
Load power is too large
Such pre-load problem is caused by lack of power calculation, you need to increase or decrease the power inverter to power the load.

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