Stand-alone contactless synchronous generator

FIELD: electricity.

SUBSTANCE: stand-alone contactless synchronous generator contains inductor with excitation winding of exciter, primary winding and additional winding. Additional winding is connected to three-phase rectifier, and output of the latter is connected to molecular energy storage unit and voltage inverter. Output of inverter is connected to primary winding. Exciter winding is connected to dc power supply via regulating element of excitation current pulse regulator. Input of excitation current pulse regulator is connected with primary winding. Electrically combined winding of excitation and armature exciter is contacted to neutral via rectifier. Number of terminal pairs of additional winding of inductor and voltage are equal to number of terminal pairs and voltage of primary winding. Input of excitation current pulse regulator is connected with primary winding of inductor, thus negative feedback for output voltage is performed. Voltage of molecular energy storage unit is equal to required allowed voltage. Voltage inverter is provided with control circuit for frequency and voltage stabilisation.

EFFECT: widening of source functionality due to connection of kinetic load with comparable power.

2 cl, 1 dwg

 

The invention relates to electric machines, namely contactless synchronous generators, industrial and high frequency.

Known contactless synchronous machine as the USSR №868936, H02K 19/38 with magnetic composite agent containing the stator anchor winding, the field winding of the exciter, additional third winding is performed on the same number of poles and armature winding machine, connected through the controlled rectifier to the field winding of the exciter and the rotor anchor winding of the exciter and the field winding of the machine, is connected through the rectifier to the anchor winding of the exciter.

The disadvantages of this machine is the complexity of the regulation of excitation in the generator mode in static and dynamic modes, low efficiency due to the many energy transformations.

The closest technical solution is (U.S. Pat. RU # 2145461, IPC NC 19/38. Offline contactless synchronous generator No. 97119560/09; Appl. 26.11.97; Publ. 10.02.00; bull. No. 4 - 6 S.: ill.).

Offline contactless synchronous generator with magnetic composite agent containing the inductor winding of the exciter, the main winding and the additional winding of the inductor is connected to three-phase rectifier, and anchored to the winding of the exciter and the field winding of the generator cipramil, pulsed excitation current controller with power element.

The disadvantage of this technical solution is a significant voltage drop when starting induction motors commensurate with the power generator.

The technical solution of the task is to expand the functional capabilities of the source by connecting the motor load commensurate with the power generator.

The task is achieved by the fact that offline contactless synchronous generator with magnetic composite agent containing the inductor winding of the exciter, the main winding and the additional winding of the inductor is connected to three-phase rectifier, and anchored combined winding of the exciter and excitation rectifier, pulse excitation current controller with power element, further comprises the molecular energy storage device and the inverter voltage, and the primary winding of inductor connected to the output terminals a, b, C, and input pulse excitation current controller with power element, the additional winding of the inductor is connected through a three-phase rectifier with molecular energy storage, and the latter to the input of the inverter voltage, the output of which is connected with the output terminals a, b, C main winding of the inductor, and the voltage inverter contains inside NYY structure of automatic stabilization of voltage and frequency.

The novelty of the claimed technical solution is achieved by the account which is offline contactless synchronous generator with combined magnetic exciter further comprises a molecular energy storage device and the inverter voltage, and the primary winding of inductor connected to the output terminals a, b, C, and input pulse excitation current controller with power element, the additional winding of the inductor is connected through a three-phase rectifier with molecular energy storage, and the latter with the inverter input voltage, the output of which is connected with the output terminals a, b, C main winding of the inductor, and the voltage inverter has an internal structure of the automatic stabilisation of frequency and voltage.

According to research and patent literature not known to the authors declare the set of features aimed at achieving the task and this solution does not follow clearly from the prior art, which allows to make a conclusion about compliance solutions to the invention level.

The invention is illustrated in the drawing, which presents a schematic diagram of the Autonomous contactless synchronous generator.

The inductor 1 generator includes a field winding of the exciter 2, the primary coil 3 with output terminals a, b, C. for More about the coil 4 is connected to three-phase rectifier 5, and the output of the latter with molecular energy storage 6 and the voltage inverter 7, the output of which is connected with the output terminals a, b, With the primary winding 3. The winding of the exciter 2 through regulatory element, for example, the transistor 8 pulse excitation current controller 9, is connected to the constant current source "plus""minus". Pulsed excitation current controller 9 its input is connected to output terminals a, b, C main winding 3.

Electrically combined excitation winding and exciter 10 anchors 11 through the rectifier 12 is locked to the zero point.

The additional winding 4 of the inductor is the number of pole pairs equal to the number of pairs of poles of the main winding and at equal voltage.

The input pulse excitation current controller 9 connected to the output of the primary winding of the inductor 3, this creates a negative feedback on the output voltage.

Molecular energy storage device 6 (capacitor with a double electric layer) applies with the necessary allowable voltage.

The voltage inverter 7, for example, with a power output IGBT transistors, has an internal management structure, for example, PWM or SHEAR stabilization of voltage and frequency.

Offline contactless synchronous generator operates as follows.

The drive motor rotates the armature 11 with SC is the rate, determined by the number of pairs of poles and the frequency of the generator current.

Due to the current in the excitation winding of the exciter 2 generates the magnetic flux, mud on the rotating armature 11 and intersecting electrically combined excitation winding and exciter 10. It induced EMF, which is rectified by the rectifier 12, you receive the constant component of the current, which creates the main thread excitation. The generator is excited, and the voltage increases on the windings of the inductor 3 and 4. When reaching a certain value of the terminal voltage And the feedback signal controls the operation of the pulsed excitation current controller 9, and the latter reduces the duration of the open state of the transistor 8, thereby limiting the excitation current and the open circuit voltage on the windings 3 and 4.

Simultaneously, the voltage of the additional winding 4 is rectified three-phase rectifier 5, charged molecular energy storage device 6. At a certain voltage on the last work joins voltage inverter 7, converts the DC voltage into AC power and operates in parallel with the main winding 3.

When connecting a load to the output terminals a, b, C voltage decreases, the feedback signal to the pulse excitation current controller 9 decreases and the latter increases the duration of the indoor state of the transistor 8, thereby increasing the excitation current in the winding of the exciter 2.

Increases the magnetic flux, which leads to the increase of the electromotive force in an electrically combined excitation winding and exciter 10 anchors 11. Increases the DC component of the current in the winding 10, increases the primary excitation current and the output voltage on the windings 3 and 4 is restored.

Simultaneously with the lowering of the output voltage at the terminals a, b, C, a voltage inverter 7 by its own control circuit stabilizes the output voltage due to the energy accumulated in the molecular energy storage 6. There is no voltage SAG especially when you start asynchronous motors commensurate with generator power.

In contrast to the known generators offered offline contactless synchronous generator has the following advantages.

1. Due to the molecular energy storage and inverter voltage no voltage SAG at the load connection of comparable power output.

2. For these reasons, it is possible to reduce the power of a drive motor. Usually for offline sources drive motor is selected stock to launch a big load.

1. Offline contactless synchronous generator with magnetic composite agent containing the inductor winding excitation sosbud the body, the main winding and the additional winding of the inductor is connected to three-phase rectifier, and anchored combined winding of the exciter and excitation rectifier, pulse excitation current controller with power element, characterized in that it contains molecular energy storage device and the inverter voltage, and the primary winding of inductor connected to the output terminals a, b, C, connected to the load, and the input pulse excitation current controller with power element, the additional winding of the inductor is connected through a three-phase rectifier with molecular energy storage, and the last with the inverter input voltage, the output of which is connected with the output terminals a, b With the main winding of the inductor.

2. Offline contactless synchronous generator according to claim 1, characterized in that the voltage inverter has an internal management structure, for example, PWM or SHEAR stabilization of voltage and frequency.



 

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