Electromagnetic chuck directly connected with alternating current power supply
Technical Field
The utility model relates to an electromagnetism jack-up technical field particularly, relates to a direct access alternating current power supply's electromagnet.
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 utility model discloses a can the lug connection to commercial power use, the commonality is strong, has solved above-mentioned problem, still has more actual problem not to solve yet, leads to unable chain and automated control of carrying on if not having control module, does not have electric leakage monitoring and voltage current detection to lead to equipment unsafe, does not have the oscillation demagnetization to lead to unloading slowly, unload not thoroughly, does not have the unable strong excitation of realization of voltage regulation and transfers the magnetism function.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides a direct access alternating current power supply's electromagnet sets up the rectification control box on the electromagnet body, and direct access alternating current can come into operation, possesses automated control and interlocking function, earth leakage protection function, excessive pressure overcurrent protection function, oscillation demagnetization function, strong excitation and accent magnetism function simultaneously, can overcome not enough in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model 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 utility model has the advantages 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 required to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an external view of an electromagnetic chuck directly connected to an ac power source according to an embodiment of the present invention;
fig. 2 is a system block 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 an electromagnetic chuck directly connected to an ac power source according to an embodiment of the present invention, which uses a single-phase ac power source;
fig. 4 is an electrical schematic diagram of an electromagnetic chuck directly connected to an ac power source according to an embodiment of the present invention, which uses a three-phase ac power source.
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 described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection 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, by providing the external control module, the automatic control and interlocking functions are realized; 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 a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.