An electric-controlled permanent-magnetic spreader control circuit and an electric-controlled permanent-magnetic spreader

Abstract

The present invention discloses a control circuit for an electrically controlled permanent magnetic spreader and an electrically controlled permanent magnetic spreader, relating to the field of spreader technology. The control circuit comprises a first rectifier bridge DB1, a second rectifier bridge DB2, a magnetizing relay KM2, and a demagnetizing relay KM3. The control circuit is provided with two rectifiers. If one rectifier fails, the spreader can continue to operate without affecting production, further improving production efficiency and saving production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of slings, and in particular to an electric-controlled permanent-magnet sling control circuit and an electric-controlled permanent-magnet sling. Background Art

[0002] The electric-controlled permanent magnetic lifter is a magnetic lifting device that combines safety, strength, convenience, efficiency, and energy conservation. It utilizes the most advanced electric-controlled permanent magnetic technology to achieve zero-cost lifting. It can lift materials in the smallest area with maximum convenience, effectively handling materials without causing them to deform under pressure, making it an ideal tool for handling steel parts.

[0003] The assembly workshop's end-wall production line used an electric-controlled permanent magnet crane to transport raw materials. However, due to aging equipment and design flaws in the charging and demagnetization control system, the crane frequently experienced problems during production, leading to frequent malfunctions. This increased maintenance pressure, and production tasks were often halted due to hoist failures, disrupting the orderly and orderly production of complete vehicles. The original circuit was unstable and often broke down, seriously affecting production schedules and wasting resources. Summary of the Invention

[0004] The object of the present invention is to provide an electric-controlled permanent magnet spreader control circuit and an electric-controlled permanent magnet spreader, which are provided with two rectifiers. When one of the rectifiers is damaged, the spreader can continue to be used without affecting production, thereby improving production efficiency and saving production costs.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A first aspect of an embodiment of the present invention provides an electric-controlled permanent magnet hoist control circuit, the control circuit comprising: a first rectifier and a second rectifier, the first rectifier and the second rectifier being connected in parallel, the first AC end of the first rectifier and the first AC end of the second rectifier being connected to the first end of an AC source, the second AC end of the first rectifier and the second AC end of the second rectifier being connected to the second end of the AC source; a magnetizing switch, the DC output end of the first rectifier being connected to the input end of the electric-controlled permanent magnet hoist via the controlled end first end of the magnetizing switch, the DC output end of the second rectifier being connected to the controlled end The second end is connected to the input end of the electric-controlled permanent magnet lifter, and the output end of the electric-controlled permanent magnet lifter is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third end of the controlled end of the magnetization switch; the demagnetization switch, the DC input end of the first rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the first end of the controlled end of the demagnetization switch, the DC input end of the second rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the second end of the controlled end of the demagnetization switch, and the output end of the electric-controlled permanent magnet lifter is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third end of the controlled end of the demagnetization switch.

[0007] In some embodiments, the electrically controlled permanent magnetic sling comprises at least two electromagnets connected in parallel.

[0008] In some embodiments, the control circuit further includes a main switch, wherein the first AC end of the first rectifier and the first AC end of the second rectifier are both connected to the first end of the AC source through the first controlled end of the main switch, and the second AC end of the first rectifier and the second AC end of the second rectifier are both connected to the second end of the AC source through the second controlled end of the main switch.

[0009] In some embodiments, fuses are provided between the first AC end of the first rectifier and the first controlled end of the main switch, and between the first AC end of the second rectifier and the first controlled end of the main switch.

[0010] In some embodiments, the control circuit further includes a damping resistor, one end of which is connected to the second end of the AC source through the second end of the controlled end of the main switch, and the other end is connected to the second AC end of the first rectifier and the second AC end of the second rectifier.

[0011] In some embodiments, the control circuit further includes a delayed on-circuit, which includes a magnetization delayed on-switch, a demagnetization delayed on-switch, and a delayed start-up switch. The magnetization delayed on-switch and the demagnetization delayed on-switch are both connected to control the on-off of the delayed start-up switch, and the delayed start-up switch is connected to control the on-off of the main switch.

[0012] In some embodiments, the control circuit also includes a main switch delayed disconnection circuit, and the main switch delayed disconnection circuit includes a first delayed disconnection switch and a second delayed disconnection switch. The first delayed disconnection switch is connected to control the on and off of the second delayed disconnection switch, and the second delayed disconnection switch is connected to control the on and off of the main switch.

[0013] In some embodiments, the control circuit also includes a charging and demagnetization switch delayed disconnection circuit, and the charging and demagnetization switch delayed disconnection circuit includes a third delayed disconnection switch and a fourth delayed disconnection switch. The second delayed disconnection switch is connected to control the on and off of the third delayed disconnection switch, and the third delayed disconnection switch is connected to control the on and off of the fourth delayed disconnection switch. The fourth delayed disconnection switch is connected to control the on and off of the magnetization delayed connection switch, the magnetization switch, the demagnetization switch, the demagnetization delayed connection switch and the second delayed disconnection switch.

[0014] In some embodiments, the control circuit also includes a remote control circuit, which includes a remote control, a magnetization start switch and a demagnetization start switch. The remote control is connected to control the on and off of the magnetization start switch and the demagnetization start switch. The magnetization start switch is connected to control the on and off of the magnetization switch. The demagnetization start switch is connected to control the on and off of the demagnetization switch.

[0015] A first aspect of an embodiment of the present invention provides an electrically controlled permanent magnet lifter, which includes the control circuit as described above.

[0016] An electric-controlled permanent magnetic lifter control circuit and electric-controlled permanent magnetic lifter according to embodiments of the present invention have at least the following beneficial effects: The control circuit is provided with two rectifiers. If one rectifier fails, the lifter can continue to operate without affecting production, thereby improving production efficiency and saving production costs. The electric-controlled permanent magnetic lifter is provided with at least two electromagnets. If one electromagnet fails, the other can be used without causing a long production pause.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a schematic diagram of the first part of a control circuit according to an embodiment;

[0020] Figure 2 FIG. 4 is a schematic diagram of the second part of the control circuit according to an embodiment. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this disclosure will be more comprehensive and complete, and will fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures indicate identical or similar parts, and thus repeated descriptions thereof will be omitted.

[0026] The technical solutions of the embodiments of the present application are briefly described below:

[0027] According to some embodiments, Figure 1 As shown, Figure 1 The first part of the control circuit schematic 100 is a control circuit for an electrically controlled permanent magnetic spreader, the control circuit comprising:

[0028] A first rectifier and a second rectifier, wherein the first rectifier and the second rectifier are connected in parallel, a first AC end of the first rectifier and a first AC end of the second rectifier are both connected to a first end L1 of an AC source, and a second AC end of the first rectifier and a second AC end of the second rectifier are both connected to a second end L2 of the AC source;

[0029] A magnetizing switch, wherein the DC output end of the first rectifier is connected to the input end of the electric-controlled permanent magnet spreader through the first controlled end of the magnetizing switch, the DC output end of the second rectifier is connected to the input end of the electric-controlled permanent magnet spreader through the second controlled end of the magnetizing switch, and the output end of the electric-controlled permanent magnet spreader is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third controlled end of the magnetizing switch;

[0030] A demagnetization switch, wherein the DC input end of the first rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the first controlled end of the demagnetization switch, the DC input end of the second rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the second controlled end of the demagnetization switch, and the output end of the electric-controlled permanent magnet lifter is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third controlled end of the demagnetization switch.

[0031] Based on the above embodiments, Figure 1 As shown, Figure 1 In the schematic diagram 100 of the first portion of the control circuit, the first rectifier and the second rectifier respectively utilize a first rectifier bridge DB1 and a second rectifier bridge DB2. The magnetization switch utilizes a magnetization relay KM2, and the demagnetization switch utilizes a demagnetization relay KM3. While other rectifier components may be used for the first and second rectifiers, this embodiment uses a rectifier bridge for detailed description. The magnetization and demagnetization switches may utilize other switching devices, but this embodiment uses relays for detailed description.

[0032] The first rectifier and the second rectifier are used to rectify alternating current into direct current.

[0033] Specific connection methods such as Figure 1 As shown, Figure 1 As shown in the schematic diagram 100 of the first part of the control circuit, the DC output end of the first rectifier bridge DB1 is connected to the input end of the electric-controlled permanent magnet lifter through the first controlled end L21 of the magnetizing relay KM2, the DC output end of the second rectifier bridge DB2 is connected to the input end of the electric-controlled permanent magnet lifter through the second controlled end L22 of the magnetizing relay KM2, and the output end of the electric-controlled permanent magnet lifter is connected to the second AC end of the first rectifier bridge DB1 and the second AC end of the second rectifier bridge DB2 through the third controlled end L23 of the magnetizing relay KM2.

[0034] Furthermore, the DC input end of the first rectifier bridge DB1 is connected to the input end of the electric-controlled permanent magnet hoist through the first controlled end L31 of the demagnetization relay KM3, the DC input end of the second rectifier bridge DB2 is connected to the input end of the electric-controlled permanent magnet hoist through the second controlled end L32 of the demagnetization relay KM3, and the output end of the electric-controlled permanent magnet hoist is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third controlled end L33 of the demagnetization relay KM3.

[0035] There are two rectifiers in the control circuit. When one of the rectifiers is damaged, the spreader can continue to be used without affecting production, further improving production efficiency and saving production costs.

[0036] The following is in conjunction with the appendix of this manual Figures 1 to 2 , the preferred embodiments of the present disclosure are further elaborated in detail.

[0037] According to some embodiments, the electrically controlled permanent magnetic suspender comprises at least two electromagnets connected in parallel.

[0038] Based on the above embodiments, Figure 1 As shown, the electric-controlled permanent magnet lifter includes a first electromagnet DCT1, a second electromagnet DCT2, a third electromagnet DCT3, a fourth electromagnet DCT4, a fifth electromagnet DCT5, a sixth electromagnet DCT6, a first fuse F1, a second fuse F2, a third fuse F3, a fourth fuse F4, a fifth fuse F5 and a sixth fuse F6, wherein one end of the first electromagnet DCT1 is connected to one end of the first fuse F1, one end of the second electromagnet DCT2 is connected to one end of the second fuse F2, one end of the third electromagnet DCT3 is connected to one end of the third fuse F3, one end of the fourth electromagnet DCT4 is connected to one end of the fourth fuse F4, one end of the fifth electromagnet DCT5 is connected to one end of the fifth fuse F5, and one end of the sixth electromagnet DCT6 is connected to one end of the sixth fuse F6. The other end of the first electromagnet DCT1 is connected to the other end of the second electromagnet DCT2, the other end of the third electromagnet DCT3, the other end of the fourth electromagnet DCT4, the other end of the fifth electromagnet DCT5 and the other end of the sixth electromagnet DCT6, and the other end of the first fuse F1 is connected to the other end of the second fuse F2, the other end of the third fuse F3, the other end of the fourth fuse F4, the other end of the fifth fuse F5 and the other end of the sixth fuse F6.

[0039] Among them, the fuse is used for overcurrent protection to prevent the electromagnet from burning out.

[0040] The electric-controlled permanent magnetic spreader is equipped with six electromagnets and six fuses. When one of the electromagnets is damaged, it will not cause a long production stoppage. When the number of damaged electromagnets reaches the set number, they will be repaired together, which improves maintenance efficiency and shortens maintenance time.

[0041] According to some embodiments, the control circuit further includes a main switch, wherein the first AC end of the first rectifier and the first AC end of the second rectifier are both connected to the first end L1 of the AC source through the first controlled end of the main switch, and the second AC end of the first rectifier and the second AC end of the second rectifier are both connected to the second end L2 of the AC source through the second controlled end of the main switch.

[0042] Based on the above embodiments, Figures 1 to 2 As shown, Figure 1 The schematic diagram 100 of the first part of the control circuit is shown below. Figure 2 In the second part of the control circuit schematic 200, the main switch is a main relay KM1. The main switch may also be other devices with a switch function. In this embodiment, a relay is used for detailed description.

[0043] Specific connection methods such as Figure 1 As shown, the first AC end of the first rectifier bridge DB1 and the first AC end of the second rectifier bridge DB2 are both connected to the first end L1 of the AC source through the first controlled end L11 of the main relay KM1, and the second AC end of the first rectifier bridge DB1 and the second AC end of the second rectifier bridge DB2 are both connected to the second end L2 of the AC source through the second controlled end L12 of the main relay KM1.

[0044] Among them, the main relay KM1 is set between the AC source and the rectifier bridge to control the power on or off of the subsequent circuit.

[0045] According to some embodiments, fuses are provided between the first AC end of the first rectifier and the first controlled end of the main switch, and between the first AC end of the second rectifier and the first controlled end of the main switch.

[0046] Based on the above embodiments, Figure 1 As shown, the first AC end of the first rectifier bridge DB1 is connected to the first controlled end L11 of the main relay KM1 through the eighth fuse F8, and the first AC end of the second rectifier bridge DB2 is connected to the first controlled end L11 of the main relay KM1 through the seventh fuse F7.

[0047] Among them, the fuse is used for overcurrent protection to prevent the rectifier bridge from burning out.

[0048] The control circuit is equipped with two rectifier bridges. When one of the rectifier bridges is damaged or the fuse in series with one of the rectifier bridges is blown, the spreader can continue to be used without affecting production, thereby improving production efficiency and saving production costs.

[0049] According to some embodiments, the control circuit further includes a damping resistor R1, one end of which is connected to the second end L2 of the AC source via the second controlled end of the main switch, and the other end is connected to the second AC end of the first rectifier and the second AC end of the second rectifier.

[0050] Based on the above embodiment, the damping resistor R1 can prevent the output circuit from resonating, thereby effectively protecting the rectifier.

[0051] Furthermore, an air circuit breaker Q1 is provided between the controlled end of the main relay KM1 and the AC source. Figure 1 As shown, the controlled end first terminal L11 of the main relay KM1 is connected to the AC source first terminal L1 through one end of the air circuit breaker Q1, and the controlled end second terminal L12 of the main relay KM1 is connected to the AC source second terminal L2 through the other end of the air circuit breaker Q1.

[0052] According to some embodiments, Figure 2 As shown, the control circuit also includes a delayed on-circuit, which includes a magnetization delayed on-switch, a demagnetization delayed on-switch and a delayed start switch. The magnetization delayed on-switch and the demagnetization delayed on-switch are both connected to control the on-off of the delayed start switch, and the delayed start switch is connected to control the on-off of the main switch.

[0053] Furthermore, the control circuit also includes a main switch delayed disconnection circuit, and the main switch delayed disconnection circuit includes a first delayed disconnection switch and a second delayed disconnection switch, the first delayed disconnection switch is connected to control the on and off of the second delayed disconnection switch, and the second delayed disconnection switch is connected to control the on and off of the main switch.

[0054] Furthermore, the control circuit also includes a charging and demagnetization switch delayed disconnection circuit, and the charging and demagnetization switch delayed disconnection circuit includes a third delayed disconnection switch and a fourth delayed disconnection switch, the second delayed disconnection switch is connected to control the on and off of the third delayed disconnection switch, the third delayed disconnection switch is connected to control the on and off of the fourth delayed disconnection switch, and the fourth delayed disconnection switch is connected to control the on and off of the magnetization delayed connection switch, the magnetization switch, the demagnetization switch, the demagnetization delayed connection switch and the second delayed disconnection switch.

[0055] Furthermore, the control circuit also includes a remote control circuit, which includes a remote control 1, a magnetization start switch and a demagnetization start switch. The remote control 1 is connected to control the on and off of the magnetization start switch and the demagnetization start switch, the magnetization start switch is connected to control the on and off of the magnetization switch, and the demagnetization start switch is connected to control the on and off of the demagnetization switch.

[0056] Based on the above embodiments, Figure 2 As shown, Figure 2 In the second part of the control circuit schematic 200, the magnetization delayed-on switch uses a time delay relay KA3, the demagnetization delayed-on switch uses a time delay relay KA6, the delayed-start switch uses a time delay relay KT1, the first delayed-off switch uses a time delay relay KT2, the second delayed-off switch uses a time delay relay KA4, the third delayed-off switch uses a time delay relay KT3, the fourth delayed-off switch uses a time delay relay KA5, the magnetization start switch uses a magnetization start relay KA1, and the demagnetization start switch uses a demagnetization start relay KA2. The magnetization delayed-on switch, demagnetization delayed-on switch, delayed-start switch, first delayed-off switch, second delayed-off switch, third delayed-off switch, fourth delayed-off switch, magnetization start switch, and demagnetization start switch may also use other switching devices. In this embodiment, relays are used for detailed description.

[0057] Specific connection methods such as Figure 2 As shown, the control circuit also includes an air circuit breaker Q2, one end of the air circuit breaker Q2 is connected to the second end L2 of the AC source, and the other end of the air circuit breaker Q2 is connected to the first controlled end KA41 of the time delay relay KA4 through the controlled end of the time delay relay KT1, and the first controlled end KA41 of the time delay relay KA4 is then connected to the neutral line N through the control end of the main connection relay KM1.

[0058] The other end of the air circuit breaker Q2 is also connected to the controlled end of the magnetizing starting relay KA1 and the first controlled end of the time delay relay KA3. The controlled end of the magnetizing starting relay KA1 and the first controlled end KA31 of the time delay relay KA3 are both connected to the control ends of the time delay relay KA3 and the magnetizing relay KM2 through the first controlled end KA51 of the time delay relay KA5. The other ends of the control ends of the time delay relay KA3 and the magnetizing relay KM2 are connected to the neutral line N.

[0059] The other end of the air circuit breaker Q2 is also connected to the controlled end of the demagnetization starting relay KA2 and the first controlled end KA61 of the time delay relay KA6. The controlled end of the demagnetization starting relay KA2 and the first controlled end KA61 of the time delay relay KA6 are then connected to the control end of the demagnetization relay KM3 and the time delay relay KA6 through the second controlled end KA52 of the time delay relay KA5. The other end of the control end of the demagnetization relay KM3 and the time delay relay KA6 is connected to the neutral line N.

[0060] The other end of the air circuit breaker Q2 is also connected to the second controlled end KA32 of the time delay relay KA3 and the second controlled end KA62 of the time delay relay KA6. The second controlled end KA32 of the time delay relay KA3 and the second controlled end KA62 of the time delay relay KA6 are then connected to the control end of the time delay relay KT1 through the second controlled end KA42 of the time delay relay KA4. The other end of the control end of the delay relay KT1 is connected to the neutral line N.

[0061] The other end of the air circuit breaker Q2 is also connected to the controlled third end L13 of the main relay KM1, and the controlled third end L13 of the main relay KM1 is further connected to the neutral line N through the control end of the time delay relay KT2.

[0062] The other end of the air circuit breaker Q2 is also connected to the controlled end of the delay relay KT2 and the third end KA43 of the controlled end of the delay relay KA4. The controlled end of the delay relay KT2 and the third end KA43 of the controlled end of the delay relay KA4 are then connected to the control end of the delay relay KA4 through the third end KA53 of the controlled end of the delay relay KA5. The other end of the control end of the delay relay KA4 is connected to the neutral line N.

[0063] The other end of the air circuit breaker Q2 is also connected to the fourth controlled end KA44 of the time delay relay KA4, and the fourth controlled end KA44 of the time delay relay KA4 is further connected to the neutral line N through the control end of the time delay relay KT3.

[0064] The other end of the air circuit breaker Q2 is also connected to the controlled end of the time delay relay KT3, and the controlled end of the time delay relay KT3 is then connected to the neutral line N through the control end of the time delay relay KA5.

[0065] The other end of the air circuit breaker Q2 is also connected to the input end of the remote control 1. One end of the output end of the remote control 1 is connected to the third end KA33 of the controlled end of the time delay relay KA3 through the third end KA63 of the controlled end of the time delay relay KA6. The third end KA33 of the controlled end of the time delay relay KA3 is then connected to the neutral line N through the control end of the magnetizing starting relay KA1. The other end of the output end of the remote control 1 is connected to the fourth end KA64 of the controlled end of the time delay relay KA6 through the fourth end KA34 of the controlled end of the time delay relay KA3. The fourth end KA64 of the controlled end of the time delay relay KA6 is then connected to the neutral line N through the control end of the demagnetization starting relay KA2.

[0066] The voltage at the first end L1 of the AC source is greater than the voltage at the second end L2 of the AC source.

[0067] In some embodiments, a power indicator light D1 is further included to indicate whether the power is on. The other end of the air circuit breaker Q2 is connected to the neutral line N through the power indicator light D1.

[0068] In some embodiments, a magnetization prompt light D2 is further included to prompt that magnetization is in progress. The magnetization prompt light D2 is connected in parallel with the control end of the delay relay KA3 and the control end of the magnetization relay KM2.

[0069] In some embodiments, a demagnetization indicator light D3 is further included to indicate that demagnetization is in progress. The demagnetization indicator light D3 is connected in parallel with the control end of the demagnetization relay KM3 and the control end of the delay relay KA6.

[0070] Furthermore, the controlled terminals KA41, KA51, KA52, KA42, KA53, KA33, KA34, KA63 and KA64 are all in a normally closed state, and the other controlled terminals are all in a normally open state.

[0071] During magnetization: remote control 1 controls the control end (coil) of magnetization starting relay KA1 to be energized, magnetization starting relay KA1 controls time delay relay KA3 and magnetization relay KM2 to be energized, the controlled first end KA31 of time delay relay KA3 is energized and self-locked, magnetization prompt light D2 is on, time delay relay KA3 controls the control end (coil) of time delay relay KT1 to be energized, and the control end (coil) of magnetization starting relay KA1 is de-energized, and the control end (coil) of demagnetization starting relay KA2 cannot be energized, time delay relay KT1 controls the control end (coil) of main relay KM1 to be energized, and main relay KM1 is energized and opened. At the beginning of magnetization, the main relay KM1 controls the control end (coil) of the time delay relay KT2 to be energized, the delay relay KT2 controls the control end (coil) of the time delay relay KA4 to be energized, the delay relay KA4 self-locks, and controls the control end (coil) of the time delay relay KT3 to be energized, controls the control end (coil) of the main relay KM1 to be de-energized, controls the control end (coil) of the time delay relay KT1 to be de-energized, the delay relay KT3 controls the control end (coil) of the time delay relay KA5 to be energized, the delay relay KA5 controls the delay relay KA3, the magnetizing relay KM2 and the delay relay KA4 to be de-energized, the magnetization is completed, and the magnetization prompt light D2 goes out.

[0072] During demagnetization: remote control 1 controls the control end (coil) of the demagnetization starting relay KA2 to be energized, the demagnetization starting relay KA2 controls the demagnetization relay KM3 and the time delay relay KA6 to be energized, the controlled end first end KA61 of the time delay relay KA6 is energized and self-locked, the demagnetization prompt light D3 is on, the time delay relay KA6 controls the control end (coil) of the time delay relay KT1 to be energized, and the control end (coil) of the demagnetization starting relay KA2 is de-energized, and the control end (coil) of the magnetization starting relay KA1 cannot be energized, the time delay relay KT1 controls the control end (coil) of the main relay KM1 to be energized, and the main relay KM1 is energized. Demagnetization begins, the main relay KM1 controls the control end (coil) of the delay relay KT2 to be energized, the delay relay KT2 controls the control end (coil) of the delay relay KA4 to be energized, the delay relay KA4 self-locks, and controls the control end (coil) of the delay relay KT3 to be energized, controls the control end (coil) of the main relay KM1 to be de-energized, controls the control end (coil) of the delay relay KT1 to be de-energized, the delay relay KT3 controls the control end (coil) of the delay relay KA5 to be energized, the delay relay KA5 controls the delay relay KA6, the demagnetization relay KM3 and the delay relay KA4 to be de-energized, the demagnetization is completed, and the demagnetization prompt light D3 goes out.

[0073] According to some embodiments, an electric-controlled permanent magnet lifter includes the control circuit as described above.

[0074] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0075] While the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. An electric permanent magnet spreader control circuit, characterized in that: The control circuit comprises: a first rectifier and a second rectifier, wherein the first rectifier and the second rectifier are connected in parallel, a first AC end of the first rectifier and a first AC end of the second rectifier are both connected to a first end of an AC source, and a second AC end of the first rectifier and a second AC end of the second rectifier are both connected to a second end of the AC source; A magnetizing switch, wherein the DC output end of the first rectifier is connected to the input end of the electric-controlled permanent magnet spreader through the first controlled end of the magnetizing switch, the DC output end of the second rectifier is connected to the input end of the electric-controlled permanent magnet spreader through the second controlled end of the magnetizing switch, and the output end of the electric-controlled permanent magnet spreader is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third controlled end of the magnetizing switch; A demagnetization switch, wherein the DC input end of the first rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the first controlled end of the demagnetization switch, the DC input end of the second rectifier is connected to the input end of the electric-controlled permanent magnet lifter through the second controlled end of the demagnetization switch, and the output end of the electric-controlled permanent magnet lifter is connected to the second AC end of the first rectifier and the second AC end of the second rectifier through the third controlled end of the demagnetization switch.

2. The control circuit according to claim 1, wherein: The electrically controlled permanent magnetic sling comprises at least two electromagnets connected in parallel.

3. The control circuit according to claim 1, wherein: The control circuit also includes a main switch, wherein the first AC end of the first rectifier and the first AC end of the second rectifier are both connected to the first end of the AC source through the first controlled end of the main switch, and the second AC end of the first rectifier and the second AC end of the second rectifier are both connected to the second end of the AC source through the second controlled end of the main switch.

4. The control circuit according to claim 3, characterized in that: Fuses are provided between the first AC end of the first rectifier and the first controlled end of the main switch, and between the first AC end of the second rectifier and the first controlled end of the main switch.

5. The control circuit according to claim 3, characterized in that: The control circuit further includes a damping resistor, one end of which is connected to the second end of the AC source via the second end of the controlled end of the main switch, and the other end of which is connected to the second AC end of the first rectifier and the second AC end of the second rectifier.

6. An electric controlled permanent magnet hanger, characterized in that: The electrically controlled permanent magnet lifter comprises the control circuit according to any one of claims 1 to 5.

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