JPH1189260A - Conduction controller for electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conduction controller which can actuate an electromagnet that operates the braking device of electric equipment, such as the motor- operated hoist, etc., under the same condition regardless of the conducting voltages. SOLUTION: Conduction controllers A-C are provided by connecting a full- wave rectifying circuit 24a between an electromagnet 19 and AC power sources 23a-23c when the voltage value of the power source 23a is 100 V, a circulating type half-wave rectifying circuit 24b between the electromagnet 19 and the power sources 23a-23c when the voltage value of the power source 23b is 200 V, or a circulating type half-wave rectifying circuit 24c and a resistor R0 having a prescribed resistance value between the electromagnet 19 and the power sources 23a-23c when the voltage value of the power source 23c is 400 V, so that the controllers A-C may rectify conducting AC voltages and, in addition, may drop the voltages to required rated voltages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electromagnet for operating a braking device for an electric machine such as an electric hoist or a shutter opening / closing device, which has the same specifications (configuration) regardless of the voltage value of an AC power supply to be energized. The present invention relates to the improvement of the current supply control device that can be manufactured in the above (1).

[0002]

2. Description of the Related Art Conventionally, electric devices such as an electric hoist H as shown in FIG. 2 have been used to lift and carry heavy objects in a factory or the like. As the electric device, for example, an electric hoist H shown in FIG.
Is wound on a hanging hook 1 for hanging a load object (not shown) by a sling wire or the like. A moving pulley 5 that can freely move up and down and slide (move) with the upper wire 4
And a winding drum 3 for winding and rewinding the winding wire 4
And a drive mechanism 7 for driving a take-up drum for rotating the motor via a speed reduction mechanism 6. The electric hoist H is attached to a support shaft 8 and rotated near a ceiling by a rotating roll 9 rotated by an electric motor (not shown). Guide rails 1
0 so that it can be moved.

A driving mechanism 7 for driving the electric hoist H
2 is connected to the winding drum 3 via a speed reduction mechanism 6 so as to be drivable in the horizontal direction, as shown in FIG. 2, and the structure thereof is, for example, as shown in FIG. An electric motor 1 for rotating a rotor shaft 12 having one end drivingly connected to the winding drum 3 via a speed reduction mechanism 6 inside
3, and fixed to the tip of the rotor shaft 12 of the electric motor 13,
A brake disk 15 provided with a brake pad 14 for braking on a peripheral edge thereof is disposed opposite to a tip end side of the rotor shaft 12 of the electric motor 13. And an electromagnet 19 to be sucked and released between the movable core 18 and the movable magnet 17 and the fixed iron core 18.
When power supply to the brake disk 15 is stopped, the movable iron core 17 abuts against the brake pad 14 of the brake disc 15 to
And a braking device 21 including a coil spring 20 having a sufficient biasing force to stop the rotation of the motor.

When a load object (not shown) is lifted / lowered and conveyed by the electric hoist H shown in FIG. 2, a required up / down movement button of the operation switch 22 is operated to switch the AC power supply (not shown). The voltage is also supplied to the electromagnet 19 shown in FIG. 3 by a command from a control device (not shown) to attract the movable iron core 17 against the urging force of the coil spring 20 and release the braking of the brake disk 15 of the braking device 21. I do. When the braking of the brake disk 15 is released, the electric motor 13 rotates the rotor shaft 12, rotates the winding drum 3 shown in FIG. 2 in a predetermined direction, and applies a load via the hoisting wire 4 and the moving pulley 5. Smoothly move the object up and down.

When the suspended load is stopped at an arbitrary position by the electric hoist H, the power supply to the electromagnet 19 is stopped by operating the stop button of the operation switch 22 and the movable core 17 is stopped. Is pressed against the brake pad 14 of the brake disk 15 by the urging force of the coil spring 20 and abuts against the brake disk 15 to brake the brake disk 15 and stop the rotation of the winding drum 3 around which the winding wire 4 is wound.

The load object stopped at an arbitrary position by the electric hoist H is rotated, for example, by turning on the left and right movement buttons of the operation switch 22 to rotate the rotating roll 9 by an electric motor (not shown), or The load hoist is manually lifted and conveyed to a predetermined position by manually pulling the electric hoist H or the like.

[0007]

However, the electromagnet 19 of the braking device 21 provided in the drive mechanism 7 of the electric hoist H is controlled by a control device (not shown) so that the voltage value of the AC power supply is adjusted to the specification of the electromagnet 19. Has been lowered to the rated voltage corresponding thereto, and this has been rectified and energized to the electromagnet 19. However, in Japan, the power supply voltage is 10
0 V, 200 V, and 400 V, and the electric hoist H is also provided with a voltage value (100 V, 200 V, 40 V) of an AC power supply installed according to the contract current of the installation location.
0V).

When a controller (not shown) having rectification and step-down functions is connected to the three kinds of power supply voltages, an electromagnet 19
Is between 100 V and 20 V.
Naturally, at 0 V and 400 V, the attractive force F of the movable core 17 of the electromagnet 19 is N, the number of turns of the coil 16 of the electromagnet 19 is I, the current value flowing through the coil 16 is I, and the force between the movable core 17 and the fixed core 18 is The width of the gap is x, the magnetic permeability of the air in the gap is μ, the surface area of the magnetic pole of the movable core 17 is S,
Assuming that the voltage between the terminals of the electromagnet 19 is E ₁ and the power consumption of the electromagnet 19 is P, the following equation is obtained.

[0009]

(Equation 1)

In addition,

In Equation 1, K is (μSP ² ) / 2 × ² ,
The voltage value of the connected AC power supply is 100V, 200V, 40V
This parameter does not change its value even when it is changed to 0V.

That is, the suction force F of the movable iron core 17
Is proportional to the square of the number of turns N of the coil 16, and inversely proportional to the square of the voltage E ₁ between the terminals of the electromagnet 19. Accordingly, the voltage between the terminals E ₁ of the electromagnet 19, when the voltage value of 100V AC power supply is energized, 200V, by 400V different,
In order to obtain a suction force F that can be attracted to the movable iron core 17 against the urging force of the coil spring 20, the number of turns N of the coil 16 is required.
Must be changed as appropriate. That is, for example, the terminal voltage E ₁ of the electromagnet 19 rectified and dropped by a control device (not shown) connected to a conventional 100 V AC power supply.
Is 45 V and the attracting force F of the movable core 17 obtained when the number of turns N of the coil 16 is 3000 turns is the minimum necessary to attract the movable core 17 shown in FIG. 3 against the urging force of the coil spring 20. the in order to obtain the attraction force F and the same suction force, when the terminal voltage E ₁ of the electromagnet 19 which is rectified and the voltage drop by the control device (not shown) connected to an AC power source of 200V and 90V, the coil The electromagnet 1 rectified and voltage-dropped by a control device (not shown) by connecting the number of turns N of 16 to a 6000 turn, 400V AC power supply
When where the terminal voltage E ₁ of 9 and 180 V, the coil 1
The electromagnet 19 had to be manufactured by changing the number of turns N of 6 to 12,000 turns.

When the number of turns N of the coil 16 is changed, since the electromagnet 19 is accommodated in the casing 11 of the drive mechanism 7 shown in FIG. I needed to. Therefore, the number of turns N of the coil 16 is 3000 turns → 6
Unless the wire diameter of the coil 16 is reduced as the number of turns increases from 000 turns to 12000 turns, it is difficult to house the electromagnet 19 in the casing 11 of the drive mechanism 7,
As a result, the operator changes the wire diameter of the coil 16 in accordance with the specifications of the electromagnet 19 to be manufactured, and changes the setup of the winding machine (not shown) for winding the coil 16 (the number of turns and the holding member of the coil 16). The production of the electromagnets 19 having different working voltages requires a lot of trouble and time, such as the necessity of changing the voltage.

The present invention has been made in view of the above-mentioned problems, and an electric power supply control device for electric equipment which enables use of electromagnets having the same specifications even when a power supply voltage supplied to an electric hoist and the like is different as required. To provide.

[0014]

According to the present invention, a voltage value of an AC power supply is 100 V between an electromagnetic magnet for operating a braking device provided in an electric machine such as an electric hoist and the AC power supply.
In the case of, the full-wave rectifier circuit is used, and the voltage value of the AC power supply is 200 V
When the voltage value of the AC power supply is 400 V, the reflux type half-wave rectifier circuit and the resistor having a predetermined resistance value are inserted and connected. Rectification was performed and the voltage was reduced to a usable rated voltage.

[0015] The energization control device according to the present invention, when the electromagnetic magnet is connected to AC power supplies having different energized voltage values,
Since the voltage between the terminals of the electromagnetic magnet can always be kept constant, it is not necessary to change the specifications (number of turns and coil wire diameter) of the electromagnetic magnet according to the voltage value of the AC power supply to be energized. Therefore, it is possible to manufacture the electromagnetic magnet economically with the same specifications, which is convenient.

[0016]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to (a) to (c). In addition, FIG.
In (c), the same parts as those shown in FIGS. FIGS. 1A to 1C show, for example, the energization control device A of the drive mechanism 7 in the electric hoist H shown in FIG.
1A to 1C schematically show, as an AC power supply for supplying electric power to the electric motor 13 and the electromagnet 19, an AC power supply 23a for supplying a voltage value of 100 V to the conduction control device A shown in FIG. However, an AC power supply 23b for supplying a voltage value of 200 V is supplied to the power supply control device B shown in FIG.
However, an AC power supply 23c for supplying a voltage of 400 V is connected to the power supply control device C shown in FIG.

Also, 24a to 24c shown in FIGS.
Reference numeral 24c is a rectifier circuit for rectifying an AC voltage applied to the electromagnet 19, and the rectifier circuit 24a in FIG.
Connect the cathode of the rectifier elements D ₁ to the anode of the rectifying element D _2, the anode of the rectifying element D ₁ is connected to the anode of the rectifier element D _3, further, the cathode of the anode of the rectifying element D ₄ of the rectifying element D ₃ And the cathode of the rectifying element D ₄ is connected to the cathode of the rectifying element D ₂ to
The ₁ to D ₄ is a full-wave rectifier circuit connected to the bridge-type.

[0018] The connection point of the cathode of the rectifying elements D ₁ and the anode of the rectifier element D ₂ is connected to one end of the AC power source 23a for supplying a voltage of 100 V, the cathode and rectification of the rectifier element D ₃ connection point between the anode of the element D ₄ is connected to the other end of the AC power supply 23a. The cathode and the connection point of the cathode and the rectifying device D ₄ of the rectifying element D ₂ is connected to one end of the electromagnet 19, further connection point between the anode of the anode and the rectifying device D ₃ of the rectifying element D ₁ Is connected to the other end of the electromagnet 19.

Next, the rectifier circuit 24b shown in FIG.
Is an anode connected to one end of the AC power supply 23b for energizing a voltage value of 200V, and the rectifying device D ₅ connecting the cathode to one end of the electromagnet 19, the alternating current power supply 23b of the anode
Connected to the other end and the other end of the electromagnet 19, a half-wave rectifier circuit reflux type constituted by a rectifying element D ₆ connected to one end of the cathode and the electromagnet 19 of the cathode the rectifying element D _5.

Further, a rectifier circuit 24c shown in FIG.
A rectifying element D ₇ having an anode connected to one end of the resistor R ₀ , a cathode connected to one end of the electromagnet 19, and an anode connected to one end of an AC power supply 23 c for applying a voltage of 400 V and the other end of the electromagnet 19. connect a half-wave rectifier circuit reflux type constituted by a rectifying element D ₈ which is connected between one end of the cathode and the electromagnet 19 of the rectifying element D ₇ a cathode, one end to the anode of the rectifying element D ₇ the other end of the resistor R ₀ connected is connected to the other end of the AC power source 23c for energizing the voltage value of the 400V a.

Next, the operation of the energization controllers A to C configured as described above will be described. The energization control devices A to C energize the electric motors 13 from the AC power supplies 23a to 23c having voltage values of 100 V, 200 V, and 400 V via power supply lines, respectively, and rotate the electric motors 13. Further, powers of 100 V, 200 V, and 400 V supplied from the AC power supplies 23 a to 23 c are respectively rectified by rectifier circuits 24 a to 24 c and supplied to the electromagnet 19 at a predetermined voltage.

[0022] The time, the terminal voltage E ₁ of the electromagnet 19 and Buck by full-wave rectifying circuit 24a shown in FIG. 1 (a), V ₁ the voltage value of the AC power supply, the phase of the voltage waveform of the AC power source Assuming θ, it is obtained by the following equation.

[0023]

(Equation 2)

Further, FIG. 1 (b), the terminal voltage E ₁ of the electromagnet 19 which is rectified and stepped down by half-wave rectifier circuit 24b, 24c reflux expression shown in (c) is, V a voltage value of the AC power source
_{1. If} the phase of the voltage waveform of the AC power supply is θ, it can be obtained by the following equation.

[0025]

(Equation 3)

That is, when a power supply voltage V _{1 of} 100 V is applied to the energization control device A shown in FIG. 1A, the terminal voltage E ₁ of the electromagnet 19 becomes

## EQU2 ## The DC voltage becomes 90 V as shown in FIG.
The power supply voltage V of 200 V is applied to the energization control device B shown in FIG.
_{When 1} is energized, the voltage E ₁ between the terminals of the electromagnet 19 becomes

## EQU3 ## A DC voltage of 90 V is obtained, and the voltage E between terminals of the electromagnet 19 becomes irrespective of the voltage value V ₁ of the supplied AC power supply.
₁ can be energized constantly.

Further, the energization control device C shown in FIG.
When energized the supply voltage V ₁ of the 400V, the voltage value drops by half-wave rectifier circuit 24c reflux expression in,

## EQU3 ## A DC voltage of 180 V is obtained, but a resistor R having a resistance value equal to the DC resistance generated in the energization control device B of FIG. 1B when a power supply voltage V _{1 of} 200 V is applied.
_0, by inserting the electrification control apparatus C shown in FIG. 1 (c), the terminal voltage E ₁ of the electromagnet 19 is lowered to 90V, FIG. 1 (a), similarly to the In the case of (b), Electromagnet 1
The terminal voltage E ₁ of 9 can be energized by unifying the DC voltage of 90V.

That is, the voltage value V ₁ of the AC power supply is 100 V
In this case, the electromagnet 1 is connected to the energization control device A shown in FIG.
9 is connected, the electromagnet 19 is connected to the energization control device B shown in FIG. 1B when the voltage value V ₁ of the AC power supply is 200 V, and when the voltage value V ₁ of the AC power supply is 400 V , by connecting the electromagnet 19 to the electrification control apparatus C shown in FIG. 1 (c), even when energized one of the power supply voltage may be a constant terminal voltage E ₁ of the electromagnet 19.

Further, the energization controllers B and C shown in FIGS. 1B and 1C have two rectifiers D ₅ and D _{6 respectively.}
Or, the rectifying element D _7, D ₈ half-wave rectifier circuit 24b reflux expression using the, since the 24c to be connected to the electromagnet 19, the AC power supply 23b, the half-wave of the AC voltage is energized from 23c the Even in the time period cut by the half-wave rectifier circuits 24b and 24c, the return current flows through the coil 16 of the electromagnet 19 shown in FIG. 3 through the half-wave rectifier circuits 24b and 24c due to the accumulated electromagnetic energy. Since the attracting force always acts on the movable core 17 of the electromagnet 19, the movable core 17 is
There is no problem that noise is generated due to vibration between the fixed core 5 and the fixed core 18.

As described above, the electromagnet 19 to which the same inter-terminal voltage E ₁ is supplied regardless of the voltage value V ₁ of the supplied AC power supply,

3 does not change the number of turns N of the coil 16, and the movable iron core 17 shown in FIG. 3 performs a favorable suction operation against the urging force of the coil spring 20 with the same attractive force F. The lifting operation of the electric hoist H shown in FIG. 2 can be performed smoothly. The electromagnet 19 shown in FIG.
Since it is not necessary to change the number of turns N of the coil 16 according to the voltage value V ₁ of the energized AC power supply, it is troublesome to prepare several types of coils 16 having different wire diameters when manufacturing electric equipment such as the electric hoist H. However, it is possible to solve the problem that the specification of the electromagnet 19 must be changed according to the voltage value V ₁ of the AC power supply to be energized.

[0031]

According to the power supply control device of the present invention, the voltage value of the AC power supply is 100 V between the AC magnet and the electromagnetic magnet for operating the braking device provided in the electric equipment such as the electric hoist.
When the voltage is V, the full-wave rectifier circuit is used.
When the voltage is V, the reflux type half-wave rectifier circuit is connected. When the voltage value of the AC power supply is 400 V, the reflux type half-wave rectifier circuit is connected to a resistor having a predetermined resistance value, and the voltage between the terminals of the electromagnetic magnet is connected. To the power supply voltage (100 V, 200 V, 40
0V), it is not necessary to change the manufacturing specifications (the number of coil turns and the coil wire diameter) of the electromagnetic magnet according to the voltage value of the AC power supply to be energized. It becomes very simple and productivity is improved. In addition, since the coil of the electromagnetic magnet can have a uniform wire diameter with respect to the voltage value of the AC power supply to be energized, a wire conventionally used for manufacturing an electromagnetic magnet connected to a 400 V AC power supply can be used. It is economical because there is no need to use an expensive coil having a small diameter.

Further, in the current supply control device of the present invention, when the voltage value of the AC power supply is 200 V or 400 V, the electromagnet is connected via the reflux type half-wave rectifier circuit.
Even when the AC voltage is half-wave rectified by the half-wave rectifier circuit, the current flowing through the coil of the electromagnet due to the energized half-wave voltage and the return current flowing during the time period when the half-wave voltage is cut are continuous. Current flows through the coil of the electromagnet, and there is no problem that the movable core vibrates and generates noise.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an energization control device for an electric hoist of the present invention.

FIG. 2 is a perspective view showing an electric hoist having a drive mechanism.

FIG. 3 is a sectional view of a main part showing an internal configuration of a drive mechanism.

[Explanation of symbols]

H Electric hoisting machine 7 Drive mechanism 13 Electric motor 16 Coil 17 Moving iron core 18 Fixed iron core 19 Electromagnet 20 Coil spring 23a to 23c AC power supply 24a to 24c Rectifier circuit A to C Current control device D _{1 to} D ₈ Rectifier R ₀ resistance

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H02M 7/06 H02M 7/06 A

Claims (1)

[Claims] 1. An apparatus in which a braking device provided in an electric device such as an electric hoist is operated by an attraction / release operation of an electromagnetic magnet, wherein the AC power supply is provided between the electromagnetic magnet and the AC power supply. Power supply voltage is 100V
When the power supply voltage is 200 V, a reflux type half-wave rectifier circuit is inserted. When the power supply voltage is 400 V, a reflux type half-wave rectifier circuit and a resistor having a predetermined resistance value are inserted. A power supply control device for electrical equipment, wherein the power supply control device rectifies a predetermined power supply voltage supplied to the electromagnetic magnet and reduces the power supply voltage to a usable rated voltage.