CN111847211A - Electromagnetic chuck directly connected with alternating current power supply - Google Patents
Electromagnetic chuck directly connected with alternating current power supply Download PDFInfo
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- CN111847211A CN111847211A CN202010692763.2A CN202010692763A CN111847211A CN 111847211 A CN111847211 A CN 111847211A CN 202010692763 A CN202010692763 A CN 202010692763A CN 111847211 A CN111847211 A CN 111847211A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means
- B66C1/06—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means electromagnetic
- B66C1/08—Circuits therefor
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Abstract
The invention discloses an electromagnetic chuck directly connected with an alternating current power supply. A rectification module, a function switching module, an auxiliary power supply module, a controllable switch circuit and a control module are arranged in the rectification control box; the control module is electrically connected with the external control module; an isolation optocoupler and a data processing module are arranged in the control module; the data processing module is connected with the current sensor and the leakage current sensor. The automatic control and interlocking functions are realized by arranging an external control module; the leakage current sensor is arranged to realize the leakage protection function; the overvoltage and overcurrent protection function is realized by arranging a current sensor and a voltage regulating switch; by arranging the function switching module, the functions of oscillation degaussing, strong excitation and stepping and magnetic adjustment are realized. The rectification control box is small and exquisite in appearance, is directly integrated and installed on the electromagnetic chuck body, can be used by being directly connected with an alternating current power supply, and achieves the functions of being simple and convenient to install and use.
Description
Technical Field
The invention relates to the technical field of electromagnetic hoisting, in particular to an electromagnetic chuck directly connected with an alternating current power supply.
Background
The electromagnetic chuck is excited by direct current, and needs to be matched with an independent rectification control cabinet for use in the actual use process, while the traditional rectification control cabinet is large in size and weight, the size of the rectification control cabinet without a transformer is not small, the width is about 500mm, the height is about 800mm, the thickness is about 300mm, and the weight is more than 100 kg. The installation wiring is comparatively complicated, and even small-size electromagnet still need provide after-sales installation service, all inconvenient for buyer and seller.
For electromagnetic coil products such as small lifting electromagnets, small electromagnetic iron removers and tool electromagnets, compared with a control cabinet of the control cabinet, the control cabinet has the advantages that the cost and the volume are both equivalent, even the volume is larger, the price is higher, and the control cabinet is often unacceptable for users when the control cabinet is purchased.
Chinese patent 201220580138.X ningbo huayu car motor limited discloses a general electromagnet, specifically discloses an electromagnet, including the electromagnet body, and the body passes through the switch and is connected to the power, be equipped with the rectifier bridge between body and the switch, optimize, body and rectifier bridge outside are equipped with common casing. The invention can be directly connected to the mains supply for use, has strong universality, solves the problems, but still has more practical problems which are not solved, for example, no control module leads to the incapability of interlocking and automatic control, no leakage monitoring and voltage and current detection lead to the unsafe equipment, no oscillation degaussing leads to the slow unloading and incomplete unloading, and no voltage regulation can realize strong excitation and magnetic regulation functions.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the electromagnetic chuck directly connected with the alternating current power supply, the rectification control box is arranged on the electromagnetic chuck body, the electromagnetic chuck can be put into use by directly connecting the alternating current power supply, and the electromagnetic chuck has the functions of automatic control and linkage, electric leakage protection, overvoltage and overcurrent protection, oscillation degaussing, strong excitation and magnetic regulation, and can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
an electromagnetic chuck directly connected with an alternating current power supply comprises an electromagnetic chuck body and a rectification control box, wherein the rectification control box arranged on the electromagnetic chuck body is connected with the alternating current power supply and provides direct current power for an electromagnetic coil in the electromagnetic chuck body, and a rectification module, a function switching module, an auxiliary power supply module, a controllable switch circuit and a control module are arranged in the rectification control box; a plurality of diodes are arranged in the rectifying module, and the rectifying module is electrically connected with the function switching module; the auxiliary power supply module is electrically connected with the output end of the rectification module, the controllable switch circuit and the control module, the control module is electrically connected with the function switching module through the controllable switch circuit, and the control module is electrically connected with the external control module. The control module is right the function switching module sends out control command to realize the strong excitation and demagnetization functions of the electromagnetic chuck and realize current closed-loop control, the external control module can realize button operation through the button box and also can realize automatic control or interlocking function through the PLC. The control module is further connected with a current sensor, the current sensor is connected with a first electromagnetic coil arranged in the electromagnetic chuck body, and the first electromagnetic coil is connected with the function switching module.
Further, be equipped with isolation opto-coupler and data processing module in the control module, isolation opto-coupler one end with the data processing module communication, the isolation opto-coupler other end with the auxiliary power source module electricity is connected.
Furthermore, 4 diodes are arranged in the rectification module, and the rectification module is connected with a single-phase alternating current power supply.
Furthermore, a voltage doubling circuit is further arranged between the rectifying module and the function switching module, the voltage doubling circuit is provided with a voltage doubling switch K11, a second electromagnetic coil, a first capacitor, a second capacitor and a third capacitor, two ends of the voltage doubling switch K11 are respectively connected with the input end of the rectifying module and the second electromagnetic coil, the first capacitor is connected with the second capacitor in series, the second electromagnetic coil is connected between the first capacitor and the second capacitor, the first capacitor, the second capacitor and the third capacitor are connected in parallel with the output end of the rectifying module, the voltage doubling switch is respectively electrically connected with the auxiliary power supply and the control module through the controllable switch circuit, and voltage doubling control is achieved by controlling the voltage doubling switch.
Furthermore, 6 diodes are arranged in the rectification module, and the rectification module is connected with a three-phase alternating current power supply.
Further, the rectifier module with be provided with first pressure regulating switch K21 between the three-phase AC power supply, the voltage switching module that second pressure regulating switch K22, third pressure regulating switch K23 and fourth pressure regulating switch K24 are constituteed, first pressure regulating switch K21, second pressure regulating switch K22, third pressure regulating switch K23 and fourth pressure regulating switch K24 are connected with auxiliary power supply, control module electricity respectively through controllable switch circuit, through switching voltage regulation is realized to pressure regulating switch's composite state.
Furthermore, be equipped with two parallelly connected and opposite direction's diode in the function switching module, two opposite direction's diode is established ties a controllable switch respectively, the function switching module still connects in parallel has electric capacity and resistance, through the on-off state and the circular telegram time of control switch, realizes stepping magnetic adjustment, strong excitation and oscillation demagnetization function.
Furthermore, the data processing module is also connected with a leakage current sensor, and the leakage current sensor is connected with the input end of the rectifying module to realize the leakage protection function.
Further, the data processing module adopts an STC series single chip microcomputer.
Further, the current sensor is a hall sensor.
The invention has the beneficial effects that: the automatic control and interlocking functions are realized by arranging an external control module; the leakage current sensor is arranged to realize the leakage protection function; the overvoltage and overcurrent protection function is realized by arranging a current sensor and a voltage regulating switch; by arranging the function switching module, the functions of oscillation degaussing, strong excitation and stepping and magnetic adjustment are realized. The rectification control box is small and exquisite in appearance, is directly integrated and installed on the electromagnetic chuck body, can be used by being directly connected with an alternating current power supply, and achieves the functions of being simple and convenient to install and use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of an electromagnetic chuck with direct access to AC power;
FIG. 2 is a system diagram of an electromagnetic chuck directly connected to an AC power source according to an embodiment of the present invention;
FIG. 3 is an electrical schematic diagram of a single-phase AC power source for a direct AC power source chuck according to an embodiment of the present invention;
fig. 4 is an electrical schematic diagram of a three-phase ac power source for a chuck with direct ac power according to an embodiment of the present invention.
In the figure: 1. an electromagnetic chuck body; 2. and a rectification control box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, an electromagnetic chuck directly connected to an ac power supply includes an electromagnetic chuck body 1 and a rectification control box 2, the rectification control box 2 replaces a connection terminal box of a conventional electromagnetic chuck and is disposed on the electromagnetic chuck body 1, and the electromagnetic chuck can be put into use by directly connecting to ac power.
As shown in fig. 2, the rectification control box 2 is connected to an ac power supply and supplies dc power to the electromagnetic coil inside the electromagnetic chuck body 1. A rectification module, a function switching module, an auxiliary power supply module, a controllable switch circuit and a control module are arranged in the rectification control box 2; a plurality of diodes are arranged in the rectifying module to form a bridge rectifying circuit, and the rectifying module is electrically connected with the function switching module; the auxiliary power supply module is electrically connected with the output end of the rectification module, a controllable switch circuit and the control module, the control module is electrically connected with the function switching module through the controllable switch circuit, the control module is electrically connected with an external control module, and the controllable switch circuit is all circuit cables connected to a controllable switch. The control module sends a control instruction to the function switching module to realize the strong excitation and demagnetization functions of the electromagnetic chuck and realize current closed-loop control, and the external control module can realize button operation, namely switching value control, through a button box; and automatic control or interlocking function, namely analog quantity control, can be realized through the PLC.
An isolation optocoupler and a data processing module are arranged in the control module; one end of the isolation optocoupler is communicated with the data processing module, and the other end of the isolation optocoupler is electrically connected with the auxiliary power supply module and the external control module in a control mode and can receive a switching value input signal; the data processing module is also connected with a current sensor, the current sensor is connected with a first electromagnetic coil arranged in the electromagnetic chuck body 1, and the first electromagnetic coil is connected with the function switching module; the data processing module is communicated with the external control module and can receive an analog input signal; the data processing module is communicated with a leakage current sensor, and the leakage current sensor is connected with the input end of the rectifying module to realize the leakage protection function.
Fig. 3 shows one embodiment, in which the rectifier module is composed of 4 diodes, and is connected to a single-phase ac power supply 220v, so that the single-phase ac power supply can be directly connected to the commercial power, which is very convenient. The control module comprises the isolation optocoupler and the data processing module, the isolation optocoupler communicates with the data processing module, the data processing module controls the function switching module, and the isolation optocoupler realizes strong and weak current separation to ensure operation safety. The function switching module is internally provided with two parallel diodes with opposite directions, the two diodes with opposite directions are respectively connected with a controllable switch in series, the function switching module is also connected with a capacitor and a resistor in parallel, and the resistor and the capacitor are respectively connected into the electromagnetic coil main loop in parallel; and the auxiliary power supply module is connected to the output end of the rectification module and supplies power to the control module and the controllable switch. The data processing module receives signals of the current sensor and the leakage current sensor and controls a controllable switch in the function switching module through the controllable switch circuit, so that the following functions are realized: when in excitation, the data processing module closes controllable switches K12 and K15 and opens K13 and K14 through the controllable switch array; when the current in the electromagnetic coil is overlarge, the data processing module disconnects all the switches through the controllable switch array and can send out an alarm signal to the outside; during demagnetization, the data processing module monitors current in real time through the current sensor, sequentially switches on and off the controllable switches K12 and K15 and K13 and K14, and sequentially switches on and off the controllable switches K16 and K17, controls the power-on time, and realizes alternation and attenuation of positive and negative currents, namely oscillation demagnetization; in the presence of leakage current, all switches are open.
In a modified embodiment, a voltage doubling circuit is further arranged between the rectifying module and the function switching module, the voltage doubling circuit is provided with a voltage doubling switch K11, a second electromagnetic coil, a first capacitor, a second capacitor and a third capacitor, two ends of the voltage doubling switch K11 are respectively connected with the input end of the rectifying module and the second electromagnetic coil, the first capacitor and the second capacitor are connected in series, the second electromagnetic coil is connected between the first capacitor and the second capacitor, the first capacitor and the second capacitor are connected in parallel with the third capacitor and connected with the output end of the rectifying module, the voltage doubling switch K11 is closed, and the output voltage is doubled.
In one embodiment, as shown in fig. 4, the rectifier module consists of 6 diodes connected to a three-phase ac power source. Rectifier module with be provided with the voltage switching module that first voltage regulating switch K21, second voltage regulating switch K22, third voltage regulating switch K23 and fourth voltage regulating switch K24 constitute between the three-phase alternating current power, B phase line connection first voltage regulating switch K21, A phase line connection second voltage regulating switch K22, third voltage regulating switch K23 is connected to the zero line, and fourth voltage regulating switch K24 is connected to the diode, link to each other after voltage regulating switch is connected to A phase line and zero line, realize voltage regulation through switching voltage regulating switch's combined state. Taking an external three-phase 380v power supply as an example, the output voltage regulation of the rectification control box 2 can be realized through the following switch combinations: K21/K22/K24 is closed, K23 is opened, and the output voltage is 537V; K21/K24 is closed, K22/K23 is opened, and the output voltage is 380V; K23/K24 is closed, K21/K22 is opened, and the output voltage is 220V; k21 is closed, K22/K23/K24 is opened, and the output voltage is 190V; k23 is closed, K21/K22/K24 is opened, and the output voltage is 110V. The direction of the exciting current in the electromagnetic coil of the electromagnetic sucker body 1 can be switched by controlling the sequential on-off of K25/K26/K27/K28. The continuous current direction switching of the electromagnetic coil in the electromagnetic chuck body 1 can be realized through the controlled and ordered switching of K29/K210.
The controllable switch, the voltage doubling switch and the voltage regulating switch are switch devices capable of controlling the on-off state of the contact through current signals, and a relay is adopted in one embodiment.
The data processing module is a PLC or a single chip microcomputer, and in one embodiment, the data processing module adopts an STC series single chip microcomputer chip.
In one embodiment, the current sensor is a hall sensor.
In summary, with the above technical solution of the present invention, the automatic control and interlocking functions are realized by setting the external control module; the leakage current sensor is arranged to realize the leakage protection function; the overvoltage and overcurrent protection function is realized by arranging a current sensor and a voltage regulating switch; by arranging the function switching module, the functions of oscillation degaussing, strong excitation and stepping and magnetic adjustment are realized. The rectifier control box 2 is small and exquisite in appearance, is directly integrated and installed on the electromagnetic chuck body 1, can be used by directly connecting an alternating current power supply, and realizes the functions of simple and convenient installation and use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An electromagnetic chuck directly connected with an alternating current power supply is provided with a rectification control box arranged on an electromagnetic chuck body, it is characterized in that a rectification module, a function switching module, an auxiliary power supply module, a controllable switch circuit and a control module are arranged in the rectification control box, a plurality of diodes are arranged in the rectifying module, the rectifying module is electrically connected with the function switching module, the auxiliary power supply module is electrically connected with the output end of the rectifying module, the controllable switch circuit and the control module, the control module is electrically connected with the function switching module through the controllable switch circuit, the control module is electrically connected with an external control module, the control module is further connected with a current sensor, the current sensor is connected with a first electromagnetic coil arranged in the electromagnetic chuck body, and the first electromagnetic coil is connected with the function switching module.
2. The electromagnetic chuck directly connected to an alternating current power supply as claimed in claim 1, wherein an isolation optocoupler and a data processing module are arranged in the control module, one end of the isolation optocoupler is in communication with the data processing module, and the other end of the isolation optocoupler is electrically connected to the auxiliary power supply module.
3. The electromagnetic chuck for directly accessing an alternating current power supply as claimed in claim 1, wherein 4 diodes are arranged in the rectifying module, and the rectifying module is connected with a single-phase alternating current power supply.
4. The electromagnetic chuck of claim 3, wherein a voltage doubling circuit is further disposed between the rectifying module and the function switching module, the voltage doubling circuit includes a voltage doubling switch K11, a second electromagnetic coil, a first capacitor, a second capacitor, and a third capacitor, two ends of the voltage doubling switch K11 are respectively connected to the input end of the rectifying module and the second electromagnetic coil, the first capacitor and the second capacitor are connected in series, the second electromagnetic coil is connected between the first capacitor and the second capacitor, the first capacitor and the second capacitor are connected in parallel to the output end of the rectifying module, and the voltage doubling switch is electrically connected to the auxiliary power supply and the control module through the controllable switch circuit.
5. The electromagnetic chuck for directly accessing an alternating current power supply as claimed in claim 1, wherein 6 diodes are arranged in the rectification module, and the rectification module is connected with a three-phase alternating current power supply.
6. The electromagnetic chuck directly connected to an alternating current power supply as claimed in claim 5, wherein a voltage switching module consisting of a first voltage regulating switch K21, a second voltage regulating switch K22, a third voltage regulating switch K23 and a fourth voltage regulating switch K24 is arranged between the rectification module and the three-phase alternating current power supply, and the first voltage regulating switch K21, the second voltage regulating switch K22, the third voltage regulating switch K23 and the fourth voltage regulating switch K24 are electrically connected with an auxiliary power supply and a control module respectively through controllable switch circuits.
7. The electromagnetic chuck for directly accessing an alternating current power supply according to claim 1, wherein two parallel diodes with opposite directions are arranged in the function switching module, the two diodes with opposite directions are respectively connected in series with a controllable switch, and the function switching module is further connected in parallel with a capacitor and a resistor.
8. The electromagnetic chuck for directly accessing to an alternating current power supply as claimed in claim 2, wherein said data processing module is further connected to a leakage current sensor, and said leakage current sensor is connected to an input terminal of said rectifying module.
9. The electromagnetic chuck for directly accessing an alternating current power supply according to claim 2, wherein the data processing module adopts an STC series single chip microcomputer.
10. The electromagnetic chuck for direct access to ac power of claim 1, wherein said current sensor is a hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692763.2A CN111847211A (en) | 2020-07-17 | 2020-07-17 | Electromagnetic chuck directly connected with alternating current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692763.2A CN111847211A (en) | 2020-07-17 | 2020-07-17 | Electromagnetic chuck directly connected with alternating current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111847211A true CN111847211A (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010692763.2A Pending CN111847211A (en) | 2020-07-17 | 2020-07-17 | Electromagnetic chuck directly connected with alternating current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111847211A (en) |
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2020
- 2020-07-17 CN CN202010692763.2A patent/CN111847211A/en active Pending
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