Magnetic stirrer circuit

Abstract

The utility model discloses a magnetic stirrer circuit, and relates to the technical field of magnetic stirrers, the magnetic stirrer circuit comprises a main control circuit and three coil control circuits, each coil control circuit comprises a coil corresponding to the coil control circuit, and each coil control circuit comprises a forward conduction circuit for controlling the forward conduction of the corresponding coil and a reverse conduction circuit for controlling the reverse conduction of the corresponding coil. According to the utility model, due to the design of the coil control circuit, when the stirrer needs to realize forward rotation stirring, the forward rotation stirring or reverse conduction of the stirrer can be realized only by switching on the forward conduction circuit to enable the current to pass through the coil in the forward direction, and when the stirrer needs to realize reverse rotation stirring, the forward rotation stirring or reverse conduction of the stirrer can be realized only by switching on the reverse conduction circuit to enable the current to pass through the coil in the reverse direction. And the current reversely passes through the coil, so that reverse rotary stirring of the stirrer can be realized, and the stirring effect is better.

Description

Technical Field

[0001] The utility model relates to a stirrer circuit control, in particular to a magnetic stirrer circuit. Background Art

[0002] Magnetic stirrer is a common basic equipment in modern laboratories, and is mostly used in experimental fields such as chemistry, biology, and medicine. The core function of this instrument is to use the effect of magnetism to drive the rotation of the rotor in the stirring container. In order to achieve the stirring function, it is very important to design the stirrer circuit.

[0003] Most of the existing stirrers can only achieve unidirectional stirring function, resulting in insufficient stirring, and the circuit structure is complex, inconvenient to repair, and the maintenance cost is relatively high. In order to achieve forward and reverse stirring of the stirrer and make the stirring more sufficient, it is necessary to design a magnetic stirrer circuit that can perform forward and reverse stirring. Utility Model Content

[0004] The utility model realizes the forward and reverse stirring function and makes it convenient for maintenance personnel to repair the circuit and reduce

[0005] In order to reduce the cost of the stirrer circuit, it is necessary to design a magnetic stirrer circuit with a simple structure.

[0006] The utility model is implemented by the following scheme: a magnetic stirrer circuit, including a main control circuit and three coil control circuits, each of the coil control circuits includes a coil corresponding to it, and each of the coil control circuits includes a forward conduction circuit for controlling the forward conduction of the corresponding coil and a reverse conduction circuit for controlling the reverse conduction of the corresponding coil.

[0007] The magnetic stirrer circuit as described above also includes a power supply circuit, and the forward conduction circuit includes a first transistor and a first resistor, the base of the first transistor in the forward conduction circuit is electrically connected to the main control circuit, the collector of the first transistor is connected to the first end of the corresponding coil, and the emitter of the first transistor is connected to the first power supply end of the power supply circuit.

[0008] The magnetic stirrer circuit as described above is characterized in that the reverse conducting circuit includes a second transistor and a second resistor, the base of the second transistor in the reverse conducting circuit is connected to the control circuit, the collector of the second transistor is connected to the first end of the corresponding coil, and the emitter of the second transistor is grounded.

[0009] As described above, in the magnetic stirrer circuit, each coil control circuit further includes an I / O protection circuit, wherein the I / O protection circuit includes a first diode and a second diode, wherein the anode of the first diode and the cathode of the second diode are commonly connected to the first end of the corresponding coil, the cathode of the first diode is connected to the first power supply end of the power supply circuit, and the anode of the second diode is grounded.

[0010] In the magnetic stirrer circuit as described above, the second end of each corresponding coil in the three coil control circuits is connected to the magnetic stirrer circuit as described above, the power supply circuit includes a power supply and an IC integrated circuit, the positive electrode of the power supply forms a first power supply end, and the positive electrode of the power supply is connected to the input end of the IC integrated circuit, the output end of the IC integrated circuit forms a second power supply end of the power supply circuit, and the second power supply end is used to power the main control circuit.

[0011] In the magnetic stirrer circuit as described above, the main control circuit is connected to a light source driving circuit, and the light source driving circuit includes an LED lamp for displaying the working status of the circuit system and a transistor switch circuit for controlling the switch of the LED lamp.

[0012] In the magnetic stirrer circuit as described above, the main control circuit is connected to a button combination circuit for controlling the system circuit.

[0013] In the magnetic stirrer circuit as described above, a capacitor for stabilizing the circuit voltage is connected between the power supply circuit and the light source driving circuit.

[0014] Compared with the prior art, this application has the following advantages:

[0015] The embodiment of the utility model provides a coil control circuit, when the stirrer needs to realize positive rotation stirring

[0016] When stirring, just connect the forward conducting circuit and make the current pass through the coil in the forward direction to realize the forward rotation stirring of the stirrer; or when the stirrer needs to realize the reverse rotation stirring, just connect the reverse conducting circuit and make the current pass through the coil in the reverse direction to realize the reverse rotation stirring of the stirrer, so that the stirring effect will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1This is a circuit principle block diagram of a magnetic stirrer according to the first embodiment of the utility model;

[0019] Figure 2 It is a circuit schematic diagram of a magnetic stirrer according to the second embodiment of the utility model. DETAILED DESCRIPTION

[0020] First embodiment:

[0021] As shown in Figure 1, the embodiment of the utility model provides a magnetic stirrer circuit, including a main control circuit 1 and a coil circuit 2. The main control circuit 1 is connected to three coil control circuits 2, and the coil control circuit 2 includes a forward conduction circuit 201 for controlling the forward conduction of the coil and a reverse conduction circuit 203 for controlling the reverse conduction of the corresponding coil. In the utility model, due to the design of the coil control circuit 2, when the stirrer needs to achieve forward rotation stirring, it only needs to turn on the forward conduction circuit 201, so that the current passes through the coil in the forward direction to achieve the forward rotation stirring of the stirrer. When the stirrer needs to achieve reverse rotation stirring, it only needs to turn on the reverse conduction circuit 203, so that the current passes through the coil in the reverse direction to achieve the reverse rotation stirring of the stirrer, so that the stirring effect will be better.

[0022] Second embodiment:

[0023] As shown in Figure 2, the embodiment of the utility model provides another magnetic stirrer circuit, including a main control circuit 1 and a coil circuit 2. The main control circuit 1 is connected to three coil control circuits 2, and the coil control circuit 2 includes a forward conduction circuit 201 for controlling the forward conduction of the coil and a reverse conduction circuit 203 for controlling the reverse conduction of the corresponding coil. In the utility model, due to the design of the coil control circuit 2, when the stirrer needs to achieve forward rotation stirring, it only needs to connect the forward conduction circuit 201, so that the current passes through the coil in the forward direction to achieve the forward rotation stirring of the stirrer. When the stirrer needs to achieve reverse rotation stirring, it only needs to connect the reverse conduction circuit 203, so that the current passes through the coil in the reverse direction to achieve the reverse rotation stirring of the stirrer, so that the stirring effect will be better.

[0024] Furthermore, in order to realize the forward conduction of the coil, a power supply circuit 3 is also included, and the forward conduction circuit 201 includes a first triode and a first resistor, the base of the first triode in the forward conduction circuit 201 is electrically connected to the main control circuit 1, the collector of the first triode is connected to the first end of the corresponding coil, and the emitter of the first triode is connected to the first power supply end of the power supply circuit 3. Preferably, the triode in the forward conduction circuit adopts a PNP triode, and when the main control circuit 1 connected to the base of the PNP triode is at a low level, the PNP triode is turned on, and the 6V power supply connected to the emitter of the PNP triode will transmit voltage to the coil, so that the coil is forward-conducted.

[0025] Further, in order to realize reverse conduction of the coil, the reverse conduction circuit 203 includes a second triode and a second resistor, the base of the second triode in the reverse conduction circuit 203 is connected to the control circuit 1, the collector of the second triode is connected to the first end of the corresponding coil, and the emitter of the second triode is grounded. Preferably, the reverse conduction circuit 203 uses an NPN triode, and after the base of the NPN triode is electrically connected to the main control circuit 1, a high level is input to turn on the NPN triode, so that the current is reversely input back to the emitter of the NPN triode and then grounded.

[0026] As a specific solution and not a limitation, see Figure 2 As shown, in different coil control circuits 2, the first transistors are transistors Q2, Q4 and Q6, and the second transistors are Q1, Q3 and Q5. In this embodiment, the first resistor is connected between the base and the emitter of the first transistor, and the second resistor is connected between the main control circuit 1 and the base of the second transistor.

[0027] Furthermore, in order to protect the I / O on the main control circuit 1 from being burned out, each of the coil control circuits also includes an I / O protection circuit 202, and the I / O protection circuit 202 includes a first diode and a second diode, the anode of the first diode and the cathode of the second diode are commonly connected to the first end of the corresponding coil, the cathode of the first diode is connected to the first power supply end of the power supply circuit, and the anode of the second diode is grounded.

[0028] In this embodiment, the base of the transistor in the forward conduction circuit 201 and the main control circuit 1 are also connected to a protection circuit for protecting I / O, which is connected by two diodes, the positive pole of the third diode is connected to the negative pole of the fourth diode, and is connected in series between the forward conduction circuit 201 and the main control circuit 1, and the positive pole of the fourth diode is also connected to a stabilizing diode D11 for stabilizing the output of the current in the circuit.

[0029] Furthermore, in order to better connect the coils, the second ends of the corresponding coils in the three coil control circuits 2 are connected. By connecting the second ends of the coils in the three coil control circuits, at least two coils can be energized at the same time, which can increase the torque and improve the stability of the stirrer.

[0030] Furthermore, in order to make the power supply have a more stable output and provide a stable voltage for the system, the power supply circuit 3 includes a power supply and an IC integrated circuit, the positive electrode of the power supply forms a first power supply end, and the positive electrode of the power supply is connected to the input end of the IC integrated circuit, and the output end of the IC integrated circuit forms a second power supply end of the power supply circuit, and the second power supply end is used to power the main control circuit. Since the IC integrated circuit has a voltage regulator and can convert a 6V voltage into a 5V voltage and output it stably, the system runs more stably.

[0031] Furthermore, in order to light up and control the LED lamp, the main control circuit 1 is connected to a light source driving circuit 4, and the light source driving circuit 4 includes an LED lamp for displaying the working state of the circuit system and a switch circuit 401 for controlling the on and off of the LED lamp. Preferably, the switch circuit 401 uses an NPN transistor, and the base of the transistor is connected to the I / O port of the main control circuit 1. When the main control circuit 1 outputs a high frequency, the switch circuit 401 is turned on, and the LED lamp becomes brighter.

[0032] Furthermore, in order to control the startup of the system circuit and the timing of the coil on and off, the single chip microcomputer 1 is connected to a button circuit 5 for controlling the system circuit. Pressing the S1 button can start the circuit system, and when the S2 button is pressed, the main control circuit 1 will be turned on and off at different times.

[0033] Furthermore, in order to stabilize the voltage output by the power supply, a capacitor for stabilizing the circuit voltage is connected between the power supply circuit 3 and the light source driving circuit 4 .

[0034] The circuit principle of the utility model is as follows: there are three coil control circuits 2 with the same structure in the system circuit. When the L1 coil needs to be forward-conducted, the main control circuit 1 connected to the base of the PNP transistor of the forward-conducting circuit 201 outputs a low level, the forward-conducting circuit 201 is turned on, and the voltage on the emitter passes through the L1 coil and the L2 coil, and then flows out from the L2 coil to reach the reverse-conducting circuit of the L2 coil circuit. The L2 reverse-conducting circuit is turned on, and the current flows back to the ground to form a loop. When the L1 coil needs to be reverse-conducted, as long as the forward-conducting circuit of the L2 coil or the forward-conducting circuit of the L3 coil is turned on, the 6V voltage will pass through the L1 coil in the reverse direction. As long as the reverse-conducting circuit 203 of the L1 coil is turned on, the current will flow back to the ground end of the reverse-conducting circuit 203 of the L1 coil to form a loop. The function of forward and reverse conduction of the coil is realized.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A magnetic stirrer circuit, characterized in that: The invention comprises a main control circuit (1) and three coil control circuits (2), each of the coil control circuits (2) comprising a coil corresponding thereto, and each of the coil control circuits (2) comprising a forward conduction circuit (201) for controlling the forward conduction of the corresponding coil and a reverse conduction circuit (203) for controlling the reverse conduction of the corresponding coil.

2. The magnetic stirrer circuit according to claim 1, characterized in that: It also includes a power supply circuit (3), the forward conducting circuit (201) including a first triode and a first resistor, the base of the first triode in the forward conducting circuit (201) being electrically connected to the main control circuit (1), the collector of the first triode being connected to the first end of the corresponding coil, and the emitter of the first triode being connected to the first power supply end of the power supply circuit (3).

3. The magnetic stirrer circuit according to claim 2, characterized in that: The reverse conducting circuit (203) comprises a second triode and a second resistor, the base of the second triode in the reverse conducting circuit (203) being connected to the control circuit (1), the collector of the second triode being connected to the first end of the corresponding coil, and the emitter of the second triode being grounded.

4. The magnetic stirrer circuit according to claim 3, characterized in that: Each coil control circuit (2) further comprises an I / O protection circuit (202), wherein the I / O protection circuit (202) comprises a first diode and a second diode, wherein the anode of the first diode and the cathode of the second diode are commonly connected to the first end of the corresponding coil, the cathode of the first diode is connected to the first power supply end of the power supply circuit, and the anode of the second diode is grounded.

5. The magnetic stirrer circuit according to claim 4, characterized in that: The second ends of the corresponding coils in the three coil control circuits (2) are connected.

6. The magnetic stirrer circuit according to claim 2, characterized in that: The power supply circuit (3) comprises a power supply and an IC integrated circuit, wherein the positive electrode of the power supply forms a first power supply end and is connected to an input end of the IC integrated circuit, and the output end of the IC integrated circuit forms a second power supply end of the power supply circuit (3), and the second power supply end is used to supply power to the main control circuit (1).

7. The magnetic stirrer circuit according to claim 2, characterized in that: The main control circuit (1) is connected to a light source driving circuit (4), wherein the light source driving circuit (4) comprises an LED lamp for displaying the working state of the circuit system and a triode switch circuit (401) for controlling the switch of the LED lamp.

8. The magnetic stirrer circuit according to claim 1, characterized in that: The main control circuit (1) is connected to a button combination circuit (5) for controlling the system circuit.

9. The magnetic stirrer circuit according to claim 7, characterized in that: A capacitor for stabilizing the circuit voltage is connected between the power supply circuit (3) and the light source driving circuit (4).

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