The invention relates to electrical engineering and can be used to power resistive loads. The technical result is to increase the efficiency of the energy converter.
Energy converter comprises a power source, the power transformer feeding a resistive load. Energy converter is equipped with a parallel resonant tank circuit and current transformer. The oscillatory circuit is tuned to resonance current and connected in parallel with the power source. Between the capacitor and an inductor connected in series oscillatory circuit the primary winding of the current transformer. The secondary winding of the current transformer is connected to the primary winding of the power transformer through the first rectifier and the second rectifier shunted. Due to the current resonance oscillation circuit increases the output power supply, which ensures its higher efficiency.
Energy converters
The invention relates to electrical engineering and can be used to power the load of the active character.
Known power converter comprising a power supply voltage transformer, whose primary winding is connected to the output of the power supply and the secondary is connected through a rectifier with resistive load (Rudenko et al., Basic converters. M. Higher School of 1980 s. 42).
The well-known energy converter is the closest to this utility model. The disadvantage of this power converter is a low efficiency.
The technical result of the utility model is to increase the efficiency of the energy converter.
This technical result is achieved in that the energy converter comprising a power supply, a power transformer with primary and secondary winding, which is connected to a resistive load, The inventive converter is equipped with a parallel resonant circuit tuned to resonance currents and current transformer, said an oscillating circuit connected across the output power, the primary winding of the current transformer connected in series between the inductor and capacitor in parallel oscillation circuit, and the secondary winding of the transformer through the first current rectifier is connected to the primary winding of a power transformer and a second shunted rectifier.
FIG. 1
1 is a circuit diagram of the energy converter. 2 is a vector diagram of a parallel oscillatory circuit.
The energy converter comprises a capacitor 1 (1), two inductor forming a parallel resonant circuit connected in parallel with the output of the power supply 3. In the condenser 1 and an inductor 2 connected in series the primary winding 4 of the current transformer 5. The secondary winding 6 of the current transformer 5 is connected 7 with the primary winding of the power transformer 8 through the first rectifier 9 formed on the diode. The secondary winding of the current transformer 5 6 shunted second rectifier 10, made as a diode. The secondary winding 11 of the power transformer 8 is connected to a resistive load 12. The parallel oscillating circuit tuned to resonance currents.
Energy converter operates as follows. 3 Power supply voltage Vin is supplied to the input of the oscillatory circuit with a capacitor and inductor 1 2 reactances are equal. This capacitor current Ic and the inductor current I L is equal to the resonance current Ip. The resonant circuit arises mode resonance currents. The current Ip in the resonant circuit is many times more current Iin pack 3. The result is increased output power 3. Then, using a current transformer 5, the rectifier 9, 10 comes voltage matching output oscillating circuit with a voltage at the output of the power transformer that is, the voltage across the resistive load 12. The current transformer 5 via a rectifier diode 9, 10 energizes oscillation circuit 7 turns of the primary winding of the power transformer 8, wherein the second rectifier diode 10 shunts the secondary circuit of the current transformer during the course of the second half-cycle. As a result of enhanced reactive power is converted into an active and supplying the load 12.
Vector diagram, graphically depicted in Figure 2 explains the operation of the oscillation circuit. From it can be seen that the resonant current Ip in the resonant circuit is many times greater than current Iin the power supply 3.
FIG. 2
In addition to the vector diagram, mathematical rationale are the following relationships values.
I H R H = + Rip UvhIr equation of balance of power,
where:
Ui - the power supply voltage 3 (B);
Reap - power at the output of the power supply (W);
Ip - resonant current (A);
Ir - the current in the circuit resistive load (A);
RH - active load resistance (ohms).
Ku = Ph / (PBX + Reap) - the gain,
where:
PH - power resistive load (W);
Rvh- power supply (W);
η = Ph / S - efficiency Efficiency:
where:
S - apparent power oscillating circuit (VA).