The high voltage proportional relationship to transform the 100 v or lower level standard secondary voltage, for the use of protection, measurement and instrumentation. At the same time, the use of voltage transformer can be high voltage and electrical isolation. Although also be in accordance with the working principle of electromagnetic induction voltage transformer equipment, but its electromagnetic structure compared with the current transformer is just the opposite. Voltage transformer secondary circuit is high impedance circuit, the size of the secondary current is decided by the impedance of the loop. Secondary load impedance, small secondary current increase, makes a in a component of current automatically to meet electromagnetic balance of the relationship between the primary and secondary side. A voltage transformer is, as it were, structure and using a limited form of special transformer. Electromagnetic single phase motor current transformer is widely used in power system (hereinafter referred to as "current transformer"), its working principle is similar to the transformer.
The principle of current transformer wiring, as shown on the left. The characteristics of the current transformer is: (1) a coil in series in the circuit, and as a result, the number of turns in a coil current depends on the load current of the circuit under test. And has nothing to do with the secondary current; (2) current transformer secondary coil of the current meter and relay to the coil impedance is 220v 1.5kw ac motor very small, so under normal circumstances, current transformer run in to a short-circuit condition. The ratio of the current transformer primary and secondary rated current, called the rated mutual acmotortrading.blogspot.com inductance of the current transformer ratio: kn = I1n/I2n Because of one coil rated current I1n standardization, secondary coil rated current I2n unification of 5 (1 or 0.5), so the rated mutual inductance current transformer ratio have also been standardized. Kn can be approximately expressed as transformer primary and secondary winding turn ratio, namely the kn material kn = N1 N2 / type of N1, N2, for one, two coil number of turns.
China export motor lamination shaft rotors
Specifications
1. Lamination of electric motor
2. IP54 class F
3. 100% copper
4. Silicon steel stamping
5. Stunning performance
The motor starting current is www.facebook.com/guohong.trading not a fixed value, in the process of motor starting, from big to small changes in the current, is the reciprocal function of time (I diesel engine = I + I/(a - t)). There is no specific formula. diesel generator Basic not just plug in the electrical impedance, only impedance, also is the dc resistance of the coil, this number is very small, so the instantaneous current is very big, can be rated current of dozens of times, but the duration is very short, usually only zero point zero seconds. As the rotating motor, a sharp drop in the auto spare parts current, if not on load 3 phase induction motor startup, will be in 1 seconds to around 10 times the rated current, along with the speed rise, after 2 single phase motor seconds can be down to 2-3 times, then continue to fall, until it is equal to the rated current, the motor speed also rose to rated speed.
TYG series rare permanent magnets three phase synchronous motor
Specifications
1. a replace of Y motor
2. larger output
3. save energy
So, motor starting current is refers to the average. Because different machine, different load and different ways of start, start time required is not the same, there is big difference between the average current. For large motor, you need to start the process of current time function for diesel generator set detailed calculation, to determine the circuit breaker protection fixed value setting. Generally small under 40 kw motor, is does not provide protection for the boot process, so the choice of circuit breaker, so long as can avoid starting current impact. Due to the action of circuit breaker is time-limited, 4 to 7 times the rated current, no-load start to choose lower limit, with maximum load startup options. The star - Angle start, start current 1.7 times lower magnetic generator than direct start, but the duration should be longer, switch to the Angle, the current changed little.
Two-phase hybrid stepper motor step Angle is 3.6 ° and 1.8 °, 5 phase hybrid stepping motors interval Angle is 0.72 ° and 0.36 ° in general. electric motor single phase motor There are also some high-performance stepper motor step Angle is smaller. Such as cross company produces a kind of stepping motor for wire walking machine, where the step Angle is 0.09 °. BERGER LAHR company in Germany (BERGER LAHR) production of three-phase hybrid water pump price stepping motor where the step Angle can dial the code permanent magnet generator switch is set to 1.8 ° and 0.9 ° and 0.72 ° and 0.36 ° and spare parts 0.18 ° and 0.09 acmotor2.blogspot.com ° and 0.072 ° and 0.036 °, combine www.dongfeng-motor.com the two and five phase hybrid stepper motor step Angle. Control precision of the ac single phase motor servo motor by the motor shaft after the rotary encoder. Panasonic digital ac servo motor, for example, in line with standard 2500 encoder of the motor, drive due to the permanent magnet generator internal used four frequency multiplication technology, the pulse equivalent to 360 ° / 10000 = 0.036 °. For with 17 encoder of the motor, drive each receive 217 electric generator = 131072 pulse motor turns a circle, namely the pulse equivalent to diesel generator set 360 ° / 131072 = 9.89 seconds. Interval Angle is 1.8 ° is 1/655 of the pulse equivalent of stepper motor.
Stator And Rotor ac induction motor parts
Specifications
1. 20 years manufacturing experience
2. competitive price,high quality
3. Material: silicon steel
13 and 3 phase induction motor grounded. Special ground wire (PE). In a setting into the diesel engine door of every building a set the ends of generator the earth and the connected line dish, the grounding resistance shall not be greater than 4. 14, lightning protection grounding and protection of the electric system is set up separately, lightning protection grounding auto spare parts resistance shall not be greater than 10. Talk single phase motor about it before, let's learn two basic formula for junior middle school physics: power = voltage by current; Copper core ac synchronous generator wire load voltage coefficient of x = x crosscutting ampere area (the coefficient of amps that should be roughly between about 5 ~ 10 amperes, about 10 in the single phase induction motor air, direct cement by death around 5, online pipe according to how much space between 6 ~ 8). Actually we decorate in the family in, basically open wire and circuit principle of www.facebook.com/guohong.trading distribution of big things come from these two basic physical formula, is very simple. Unfortunately, under our current market situation, more than 99% of all home electrical and magnetic generator decoration company materials manufacturers and habits to judge on the basis of the so-called experience.
