TWM507577U - Dynamic magneto-electric amplifying device - Google Patents

Description

Dynamic magnetoelectric amplification device

The present invention relates to an electrical energy amplifying device, and more particularly to a dynamic magnetoelectric amplifying device.

Referring to FIG. 1 , a three-phase induction motor 1 can be directly driven by an AC mains AC to output a reluctance generator 2 coupled to a torque coupled with a fixed rotation speed to cause the reluctance generator 2 to be generated. Three-phase AC power output. In order to allow the reluctance generator 2 to output 1 KW of power, the AC mains must also be input to the three-phase induction motor 1 with respect to the input 1 KVA (apparent power).

However, due to the inductive load (such as the coil winding) in the three-phase induction motor 1, a large amount of virtual power is generated due to the excitation during the magnetic field commutation process, so that the current waveform of the AC mains is behind the voltage waveform, resulting in the actual consumption of the three-phase induction motor 1. The decrease in real power causes a difference in power factor and increases the power loss of the AC power supply.

Therefore, the present invention provides a dynamic magneto-amplification device having an output energy greater than an input energy.

Thus, the present invention relates to a dynamic magneto-amplification device using one a DC power supply, comprising: a three-phase induction motor having a stator and a rotor, wherein the stator has three-phase windings; a generator driven by the three-phase induction motor to generate a power signal; an inductive servo controller Receiving the DC power supply, and comprising: three bridge arms connected in parallel with the DC power supply, each bridge arm having an upper switch and a lower switch connected in series with a contact, and two separate and the upper switch and the a lower flywheel diode corresponding to the reverse switch, the one end of the upper switch is electrically coupled to a positive end of the DC power source, and one end of the lower switch is electrically coupled to a negative end of the DC power source, and the third The two ends of the phase winding are respectively electrically coupled between the contacts of the adjacent two bridge arms; and a damping capacitor is connected in parallel with the DC power source, and the upper switch of one of the adjacent two bridge arms The lower switch of the other bridge arm is turned on, and the phase winding electrically coupled between the adjacent two bridge arms is connected to the DC power source and excited by the same to drive the rotor to rotate, so that the generator is driven to operate. And outputting the power signal, and When the upper switch of one of the adjacent two bridge arms and the lower switch of the other bridge arm are switched from conductive to non-conductive, the phase winding electrically coupled between the adjacent two bridge arms will be instantaneously generated. A counter electromotive force is applied to the damper capacitor via a flywheel diode that is in anti-parallel with the upper switch of one of the adjacent two bridge arms and a flywheel diode that is in anti-parallel with the lower switch of the other bridge arm.

In an embodiment, the DC power source is a rechargeable battery. And when the voltage of the DC power source is lower than the voltage of the damping capacitor, the damping capacitor charges the DC power source.

In an embodiment, the damping capacitor is a working frequency The non-polar IF capacitor of the switching frequency of the inductive servo controller.

In an embodiment, the generator is a reluctance generator, An alternator or a direct current generator (Dynamo).

In an embodiment, the novel dynamic magneto-amplification device further includes A mechanical damper is provided that is coupled to the rotor of the three-phase induction motor and a rotor of the generator.

In an embodiment, the mechanical damper is a flywheel.

The novel inductive servo controller is powered by a DC power supply and The damping capacitor connected in parallel with the switch bridge arm absorbs the back electromotive force generated by the switching of the three-phase winding of the three-phase induction motor to store energy, and timely recharges to the DC power source, thereby increasing the power supply time of the DC current, and by sensing servo The controller converts the real power provided by the DC power source into an apparent power output to the three-phase induction motor to drive the three-phase induction motor to operate, so that the DC power supply only needs to provide a small amount of real power, that is, the three-phase induction motor can generate a large amount of virtual The power drives the rotation of the rotor to achieve the effect and purpose of the new output energy greater than the input energy.

3‧‧‧Three-phase induction motor

4‧‧‧Magnetoresistive generator

5‧‧‧Induction servo controller

6‧‧‧Mechanical damper

31, 41‧‧‧ rotor

51~53‧‧‧Bridge arm

Vdc‧‧‧DC power supply

R, S, T‧‧‧ three-phase alternating current

a, b, c‧‧‧ winding

A, B, C‧‧‧ winding

Cd‧‧‧ damping capacitor

U, V, W‧‧‧ contacts

U+, V+, W+‧‧‧ switch

U-, V-, W-‧‧‧ switch

D‧‧‧Flywheel diode

e‧‧‧Counter-electromotive force

Other features and effects of the present invention will be clearly shown in the embodiments with reference to the drawings. FIG. 1 is a schematic diagram of a conventional method for directly driving a three-phase induction motor by AC mains; FIG. 2 is a dynamic magnetic current of the present invention. An overall circuit block diagram of an embodiment of an amplifying device; FIG. 3 is a schematic diagram of a three-phase winding and a rotor of the three-phase induction motor of the present embodiment; 4 is a schematic diagram of a three-phase winding and a rotor of the reluctance generator of the embodiment; FIG. 5 is a detailed circuit diagram of the induction servo controller of the embodiment; FIG. 6 is a three-phase induction of the induction servo controller of the embodiment. A schematic diagram of one of the windings of the motor; and FIG. 7 is a schematic diagram of the induction servo controller of the present embodiment for charging a counter electromotive force generated by one of the three-phase induction motors to the damping capacitor.

Referring to FIG. 2, an embodiment of the dynamic magneto-amplification device of the present invention mainly includes a three-phase induction motor 3, which is coupled to the three-phase induction motor 3 to be driven by the three-phase induction motor 3 to generate a power signal output. The generator 4, and an inductive servo controller 5 that receives the DC power supply and controls the operation of the three-phase induction motor 3. In the present embodiment, the generator 4 is exemplified by a reluctance generator, but not limited thereto, that is, the generator 4 can also be driven by the three-phase induction motor 3 to generate electricity. The signal is output from an alternator or a direct current generator (Dynamo).

Referring to FIG. 3, the three-phase induction motor 3 has a stator (not shown), a rotor 31, and three-phase windings a, b, c wound around the stator, and the three-phase windings a, b, c is connected by △ type wiring, but it can also be connected by Y type wiring, not limited to this. Referring to FIG. 4, the reluctance generator 4 has a stator (not shown), a rotor 41 coupled to the rotor 31 of the three-phase induction motor 3, and a rotor 41 disposed around the stator (not shown). Three-phase windings A, B, and C, and the three-phase windings A, B, and C are connected by a delta type wiring.

Referring to FIG. 5, the inductive servo controller 5 receives a DC power supply Vdc, such as a battery or a rechargeable battery, and includes three bridge arms 51-53 in parallel with the DC power supply Vdc, and a parallel connection with the DC power supply Vdc. Damping capacitor Cd. Each of the bridge arms 51-53 has an upper switch U+, V+, W+ and a sub-switch U-, V-, W-, and a separate switch U+, respectively connected to a contact U, V, W. , V+, W+ and the lower switch U-, V-, W- corresponding and anti-parallel flywheel diode D, wherein one end of each of the upper switches U+, V+, W+ is electrically coupled with a positive terminal of the DC power supply Vdc One end of each of the lower switches U-, V-, and W- is electrically coupled to a negative end of the DC power supply Vdc, and the two ends of the three-phase windings a, b, and c are respectively electrically coupled to each other. Between the contacts of the bridge arm, for example, the winding a is electrically coupled between the contacts U and V, the winding b is electrically coupled between the contacts V and W, and the winding c is electrically coupled to the contacts W and U. between. In addition, the upper switches U+, V+, W+ and the lower switches U-, V-, W- are power transistors.

Moreover, the inductive servo controller 5 is a switching (switching) controller which sequentially excites the three-phase coils a, b, c of the three-phase induction motor 3 by means of a phase excitation method, that is, controls in a basic period. The two adjacent bridge arms are turned on. For example, as shown in FIG. 6, the upper switch U+ of the bridge arm 51 and the lower switch V- of the bridge arm 52 are turned on, so that the DC power source Vdc is electrically coupled to the upper switch U+ and the lower switch V-. The coil a is connected, and the output current voltage is excited to the coil U1 to convert the electric energy into magnetic energy, and then the upper switch U+ and the lower switch V- are not turned on, and then the upper switch V+ and the bridge arm of the bridge arm 52 are connected. The lower switch W- of 53 is turned on, so that the DC power supply Vdc is energized to the coil b electrically coupled between the upper switch V+ and the lower switch W-, and then the upper switch V+ and the lower switch W- are not turned on. Then, the coil c is excited in the same manner, and the above operation mode is continuously repeated, whereby the three-phase windings a, b, c continuously generate a three-phase alternating magnetic field (rotating magnetic field), and the rotor 31 cuts the alternating magnetic field. The magnetic field lines generate an induced electromotive force that drives the rotor 31 to follow the three-phase alternating magnetic field.

At the same time, the rotor 31 of the three-phase induction motor 3 synchronously drives the rotor 41 of the reluctance generator 4 to rotate, so that the three-phase windings A, B, and C of the reluctance generator 4 are respectively induced by the magnetic field of the rotor 41. The current, therefore, when the rotor 31 continues to rotate the rotor 41 at a fixed rotational speed, for example, 50/60 Hz, the three-phase windings A, B, C will have phase differences 120 in output phase. The three-phase AC R, S, T is equivalent to outputting a regular three-phase AC mains supply, and can be directly supplied to a load requiring a three-phase AC power supply.

At the same time, as shown in FIG. 7, in the induction servo controller 5, each time the coil a electrically coupled between two adjacent bridge arms, for example, the bridge arms 51, 52, is excited, because of DC When the power supply Vdc is not deducted and is demagnetized instantaneously, the coil a generates a counter electromotive force e due to the sudden disappearance of the magnetic energy, and passes through the flywheel diode D in anti-parallel with the upper switch V+ of the bridge arm 52 and the lower side of the bridge arm 51. The switch U-anti-parallel flywheel diode D charges the damping capacitor Cd. Moreover, the snubber capacitor Cd of the present embodiment is a non-polar IF capacitor that can match the switching frequency of the induction servo controller 5.

Thereby, when the phase windings a, b, c are instantaneously disconnected because the connected bridge arms 51, 52, 53 are instantaneously disconnected, a large current generated by the high-voltage counter electromotive force will flow into the damping capacitor Cd without directly Flowing through the DC power supply Vdc, the DC power supply Vdc can be prevented from being damaged by an excessive current surge, and the back electromotive force energy generated by the windings a, b, and c of each phase can also be stored. There is a damping capacitor Cd that is utilized without wasting.

Therefore, during the continuous operation of the three-phase induction motor 3, each phase The current generated by the windings a, b, and c due to the counter electromotive force will alternately and continuously charge the damper capacitor Cd, so that the damper capacitor Cd is maintained in a state of full electric energy. In this way, when the DC power source Vdc, for example, the voltage of the battery is lower than the potential of the damper capacitor Cd, the damper capacitor Cd is charged to the DC power source Vdc in a timely manner, and the power supply time of the DC power source Vdc can be increased.

And due to the alternating current type generated by the windings a, b, c of each phase The back electromotive force (current) can respectively discharge the damping capacitor Cd by discharging the discharge path formed by the flywheel diode D on the bridge arms 51, 52, 53 electrically coupled to the phase windings a, b, c, respectively. The energy causes the inductive servo controller 5 to not generate high temperatures, and the DC power source Vdc, such as the battery, does not burn or suffer its service life due to high temperature.

Furthermore, since the DC power supply Vdc provides a DC voltage, The current and voltage are in phase, and only the real power is output to the inductive servo controller 5, and since the DC power source Vdc (for example, a battery or a rechargeable battery) can accumulate a large amount of electric energy, the characteristics of the large capacitor are made, so that the DC power source Vdc and the induction servo are provided. The power factor of the overall circuit composed of the controller 5 and the three-phase induction motor 3 will be reduced to a very low level, for example, only 0.1 or even lower. Therefore, the DC power supply Vdc only needs to output a small amount of real power, for example, 100 W for the induction servo. The controller 5, the three-phase induction motor 3 generates 900 W of virtual power, and the induction servo controller 5 outputs 1 KVA of apparent power to the three-phase induction motor 3. Therefore, the DC power supply Vdc only needs to output a small amount of real power, which causes the three-phase induction motor 3 to generate a large amount of virtual power, thereby driving The reluctance generator 4 generates electricity, so that the output energy of the novel dynamic magneto-amplification device is greater than the input energy, and achieves the efficacy and purpose of the novel.

And when the inductive servo controller 5 controls the bridge arms 51~53 switching frequency and pulse width modulation, and output such as 1KVA (apparent power) to the three-phase induction motor 3, even if the three-phase induction motor 3 generates a large amount of virtual power during the magnetic field commutation process (for the coil Excitation, for example, 900W, but this does not affect the DC power supply Vdc, that is, the power (real power) provided by the DC power supply Vdc will still be completely consumed on the three-phase induction motor 3 without causing a real power drop. Therefore, the power supply loss of the DC power source Vdc is not caused.

Further, the present embodiment is in the rotor 31 of the three-phase induction motor 3 The rotor 41 of the reluctance generator 4 is also coupled (shafted) with a mechanical damper, such as a flywheel as a buffer, which can eliminate the three-phase induction motor 3 during braking during acceleration and deceleration. The reaction force helps to improve the stability of the system and reduce the power consumption of the three-phase induction motor 3.

In summary, the inductive servo controller 5 of the above embodiment borrows The damping capacitor Cd connected in parallel with the DC power source Vdc and the switching bridge arms 51-53 absorbs the back electromotive force generated by the three-phase windings a, b, and c of the three-phase induction motor 1 due to switching of the switch to store energy, and timely recharges Up to the DC power source Vdc, and boosting the power supply time of the DC current Vdc, and converting the real power provided by the DC power source Vdc into the apparent power by the induction servo controller 5, and driving the three-phase induction motor 3 to operate, so that the DC power source Vdc is only Providing a small amount of real power, that is, the three-phase induction motor 3 can generate a large amount of virtual power during the magnetic field commutation process to push the rotor 31 to rotate, so that the output energy is greater than the input. The efficacy and purpose of energy.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

5‧‧‧Induction servo controller

51~53‧‧‧Bridge arm

Vdc‧‧‧DC power supply

a, b, c‧‧‧ winding

Cd‧‧‧ damping capacitor

U, V, W‧‧‧ contacts

U+, V+, W+‧‧‧ switch

U-, V-, W-‧‧‧ switch

D‧‧‧Flywheel diode

Claims (6)

A dynamic magnetoelectric amplification device, which uses a DC power supply, and includes: a three-phase induction motor having a stator and a rotor, and the stator has a three-phase winding; and a generator driven by the three-phase induction motor to output a A power signal; an inductive servo controller that receives power from the DC power source and includes: three bridge arms connected in parallel with the DC power source, each bridge arm having an upper switch and a lower switch connected in series with one contact, and two a flywheel diode corresponding to the upper switch and the lower switch and oppositely connected in parallel, one end of the upper switch is electrically coupled to a positive end of the DC power source, and one end of the lower switch and a negative of the DC power source The terminal is electrically coupled, and the two ends of the three-phase winding are respectively electrically coupled between the contacts of the adjacent two bridge arms; and a damping capacitor is connected in parallel with the DC power supply, and each adjacent two The upper switch of one of the bridge arms and the lower switch of the other bridge arm are turned on, and the phase winding electrically coupled between the adjacent two bridge arms is connected to the DC power source and excited by the DC power source to drive the rotor Rotate to make the hair The machine operates to output the power signal, and is electrically coupled to the adjacent two bridges whenever the upper switch of one of the adjacent two bridge arms and the lower switch of the other bridge arm are switched from conductive to non-conductive. The phase winding between the arms will instantaneously generate a counter electromotive force and be reversed via the upper switch of one of the adjacent two bridge arms The damper capacitor is charged by a parallel flywheel diode and a flywheel diode in anti-parallel with the lower switch of the other bridge arm. The dynamic magneto-amplification device of claim 1, wherein the DC power source is a rechargeable battery, and when the voltage of the DC power source is lower than the voltage of the damping capacitor, the damping capacitor charges the DC power source. The dynamic magneto-amplification device of claim 1, wherein the damping capacitor is a non-polar intermediate frequency capacitor whose operating frequency can match the switching frequency of the inductive servo controller. The dynamic magneto-amplification device of claim 1, wherein the generator is a reluctance generator, an alternator or a direct current generator (Dynamo). The dynamic magneto-amplification device of claim 1, further comprising a mechanical damper disposed at a rotor of the three-phase induction motor coupled to a rotor of the generator. The dynamic magneto-amplification device of claim 5, wherein the mechanical damper is a flywheel.