CN114362500B - Voltage stabilization protection device, motor controller and motor - Google Patents
Voltage stabilization protection device, motor controller and motor Download PDFInfo
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- CN114362500B CN114362500B CN202111555841.5A CN202111555841A CN114362500B CN 114362500 B CN114362500 B CN 114362500B CN 202111555841 A CN202111555841 A CN 202111555841A CN 114362500 B CN114362500 B CN 114362500B
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- 230000010355 oscillation Effects 0.000 claims abstract description 42
- 239000011324 bead Substances 0.000 claims description 19
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Abstract
The invention discloses a voltage stabilizing protection device, a motor controller and a motor, wherein the device comprises: a switching unit provided at an output side of the external input power source; the first zener diode unit is arranged at the output side of the switch unit; the current limiting unit is arranged between the first zener diode unit and the load power supply port; at the on-off moment of the switch unit, the oscillating negative voltage and the oscillating negative current generated by the switch unit can pass through the first voltage-stabilizing diode unit and then pass through the current-limiting unit. According to the scheme, the current limiting resistor which does not flow through the voltage stabilizing circuit is controlled to be negative voltage and negative current oscillation in the moment of switching elements such as an alternating current contactor and the like are switched on and off, so that the current limiting resistor can be prevented from being burnt out, and further the fault shutdown of a motor is avoided.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a voltage stabilizing protection device, a motor controller and a motor, in particular to a voltage stabilizing protection circuit for preventing on-off faults of the motor, the motor controller with the voltage stabilizing protection circuit and the motor with the motor controller.
Background
When the motor works, the motor is controlled to operate and stop by matching with electric elements such as an alternating current contactor and the like to execute on-off actions, the actions can be called as tool on-off, and the action sequence is as follows: when the motor operates, the alternating current contactor is disconnected to stop the motor; when the motor stops, the alternating current contactor is connected to enable the motor to run.
In the design of a direct current motor controller, an external input power supply is converted and processed by controlling the action sequences of various electronic elements, and the processed and reliable required voltage and current are provided for a motor main control chip.
The voltage stabilizing circuit designed by the motor controller needs to use a voltage stabilizing diode. In the voltage stabilizing circuit of the related scheme, after the external input power source is input into the motor controller, the current is limited by the current limiting resistor, and then the processed voltage and current signals are provided for the motor main control chip by the voltage stabilizing diode, the magnetic bead, the filter capacitor and other elements, and then the processed voltage and current which are reliable and are required by the motor main control chip are provided for the motor main control chip.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention aims to provide a voltage stabilizing protection device, a motor controller and a motor, which are used for solving the problems that in a voltage stabilizing circuit of the motor controller, after an external input power supply is input to the motor controller, voltage and current are provided for a motor main control chip through a current limiting resistor, then through elements such as a voltage stabilizing diode and the like, but when the motor is switched on and off by a switching element such as an alternating current contactor and the like, a great oscillation negative voltage and negative current are generated, so that the current limiting resistor is burnt out, and then the motor is in fault shutdown.
The invention provides a voltage stabilizing protection device which can be applied between an external input power supply and a load power supply port; the voltage stabilizing protection device comprises: the switching unit, the first zener diode unit and the current limiting unit; wherein the switch unit is arranged on the output side of the external input power supply; the first zener diode unit is arranged at the output side of the switch unit; the current limiting unit is arranged between the first zener diode unit and the load power supply port; at the moment of switching on and off of the switching unit, the oscillating negative voltage and the oscillating negative current generated by the switching unit can pass through the first voltage-stabilizing diode unit and then pass through the current-limiting unit.
In some embodiments, the switching unit includes: a first switching element and a second switching element; the first switching element is arranged on a positive electrode connecting line of the output side of the external input power supply; the second switching element is arranged on a negative electrode connecting line of the output side of the external input power supply; the cathode of the first zener diode unit is arranged at the output side of the first switching element; the anode of the first zener diode unit is arranged at the output side of the second switching element; the first end of the current limiting unit is arranged at the cathode of the first zener diode unit; a second end of the current limiting unit leads to the load supply port.
In some embodiments, further comprising: a magnetic bead unit; the magnetic bead unit is arranged on the output side of the current limiting unit.
In some embodiments, further comprising: a filtering unit; the filtering unit is positioned on the output side of the current limiting unit and is arranged between the input side of the load power supply port and the ground.
In some embodiments, further comprising: a filtering unit; the filtering unit is positioned on the output side of the magnetic bead unit and is arranged between the input side of the load power supply port and the ground.
In some embodiments, the current limiting unit includes: a current limiting resistor; the number of the current limiting resistors is more than one; and under the condition that the number of the current limiting resistors is more than two, more than two current limiting resistors are arranged in parallel.
In some embodiments, further comprising: a second zener diode unit; the second zener diode unit is arranged at the output side of the current limiting unit; the cathode of the second zener diode unit is arranged at the second end of the current limiting unit; and the anode of the second zener diode unit is grounded.
In accordance with another aspect of the present invention, there is provided a motor controller comprising: the voltage stabilizing protection device is described above.
In accordance with another aspect of the present invention, in combination with the above motor controller, there is provided a motor comprising: the motor controller described above.
In the scheme of the invention, after an external input power supply is input into the motor controller in the voltage stabilizing circuit of the motor controller, voltage and current are provided for the motor main control chip through elements such as a voltage stabilizing diode, a current limiting resistor and the like, so that oscillating negative voltage and negative current generated when the motor is switched on and off by a switching element such as an alternating current contactor are conducted through the voltage stabilizing diode, and the current does not flow through the current limiting resistor; therefore, the current limiting resistor which does not flow through the voltage stabilizing circuit is controlled to be negative voltage and negative current oscillation at the moment of switching on and off of the switching elements such as the alternating current contactor, so that the current limiting resistor can be prevented from being burnt out, and further the motor is prevented from being stopped due to faults.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of a voltage stabilizing protection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a voltage stabilizing circuit according to the related art;
FIG. 3 is a schematic diagram showing the voltage conduction direction of the voltage stabilizing circuit according to the related scheme, wherein the voltage stabilizing circuit limits the burning of the current resistor during voltage oscillation;
FIG. 4 is a schematic diagram of the voltage conduction direction of the voltage stabilizing circuit according to the related scheme for protecting the current limiting resistor from burning out during voltage and current oscillation;
FIG. 5 is a schematic diagram illustrating an embodiment of a voltage stabilizing circuit according to the present invention;
FIG. 6 is a schematic diagram of the voltage conduction direction of the voltage stabilizing protection circuit during voltage oscillation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to an embodiment of the invention, a voltage stabilizing protection device is provided. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The voltage stabilizing protection device can be applied between an external input power supply and a load power supply port. The voltage stabilizing protection device comprises: the switching unit, the first zener diode unit and the current limiting unit. A switching unit such as a switching element M. The first zener diode unit is, for example, a zener diode D1 provided at the front end of the current limiting resistor R1 in the example shown in fig. 5 and 6. A current limiting unit such as a current limiting resistor R1. And a load power supply port, such as a power supply input port 2 of a main control chip of the motor.
Wherein the switch unit is arranged on the output side of the external input power supply.
The first zener diode unit is arranged at the output side of the switch unit.
The current limiting unit is arranged between the first zener diode unit and the load power supply port.
At the moment of switching on and off of the switching unit, the oscillating negative voltage and the oscillating negative current generated by the switching unit can pass through the first voltage-stabilizing diode unit and then pass through the current-limiting unit.
Fig. 2 is a schematic diagram of a voltage stabilizing circuit according to an embodiment of the related art. In fig. 2, a voltage stabilizing circuit includes: an external power equivalent resistor R1, an external input power E, a switching element M, a current-limiting resistor R1, a zener diode D1, a magnetic bead L1 and a nonpolar capacitor C1. The output end of the voltage stabilizing circuit is output to the power input port 2 of the motor main control chip to supply power to the motor main control chip. The circuit is externally input with an external power input (such as external direct current power supply), an equivalent resistor r1 of the external power input and an external switching element M, the circuit is output with a power input port 2 of a motor main control chip, and the power input port 2 of the motor main control chip provides required working voltage and working current for the motor main control chip.
The voltage stabilizing circuit of the related scheme consists of an external power supply input, an external switching element (such as an alternating current contactor and the like), a resistor R1, a magnetic bead L1, a voltage stabilizing diode D1, a nonpolar capacitor C1, a ground GND port and a power supply input port 2 of a motor main control chip, wherein the switching element (such as the alternating current contactor and the like) generates oscillating voltage and oscillating current when being switched on and off, the resistor R1 is a current limiting resistor, the voltage stabilizing diode D1 plays a role in stabilizing voltage, and particularly, the voltage stabilizing diode D1 is connected in the circuit later than a current limiting resistor, namely, when the external power supply input is subjected to the current limiting effect of the current limiting resistor, the magnetic bead L1 is specially used for inhibiting high-frequency noise and peak interference of the voltage stabilizing circuit and has the capacity of absorbing electrostatic pulses, and the capacitor C1 is used for filtering.
In the voltage stabilizing circuit provided by the scheme of the invention, the voltage stabilizing diode moves forward in the current limiting resistor, namely the protection diode M, the voltage stabilizing diode D1, the current limiting resistor R1, the magnetic bead L1 and the capacitor C1 circuit, and is mainly characterized in that the D1 is connected with an external power supply circuit before the R1.
FIG. 3 is a schematic diagram showing the voltage conduction direction of the voltage stabilizing circuit according to the related scheme, which limits the burning of the current resistor during voltage oscillation. The action sequence of the voltage stabilizing circuit in the related scheme can be seen in an example shown in fig. 3 when the alternating current contactor is on or off, when the motor normally operates, the external power supply inputs positive directions (voltage and current), the input is provided to the motor main control chip after passing through the current limiting resistor R1, the voltage stabilizing diode D1 and the filter capacitor (such as the nonpolar capacitor C1), at this time, the voltage stabilizing diode D1 normally performs voltage stabilizing operation, the voltage and current directions of the current limiting resistor R1 are positive and negative (positive voltage oscillation is seen in a short-dashed line conduction flow S1 in fig. 3).
When the motor is switched on or off (i.e. is switched on), the switching element M generates oscillation negative voltage B and negative heavy current, at the moment, the zener diode D1 is positively conducted (conducted when the voltage is larger than the conducting voltage a), the oscillation negative voltage B and the negative heavy current directly pass through the current-limiting resistor R1, the power is far larger than the rated power of the current-limiting resistor R1, the current-limiting resistor R1 is damaged, at the moment, the voltage and the current direction of the current-limiting resistor R1 are A negative B positive, after the current-limiting resistor R1 is damaged, the power input circuit cannot work normally, and the motor is stopped due to failure (the negative voltage oscillation is shown in a long-dashed line conducting flow S2 in fig. 3).
Among the characteristics of the zener diode itself: when the anode voltage is greater than the cathode voltage (the anode of the zener diode D1 is connected with GND in the scheme of the present invention), the zener diode exhibits a single-pass characteristic of a common diode, i.e. current can flow from the anode to the cathode of the zener diode, and the turn-on voltage a in the scheme of the present invention can be regarded as: the voltage which can lead the current of the voltage stabilizing tube to flow from the anode to the cathode is similar to the conducting voltage of a common diode;
fig. 4 is a schematic diagram of voltage conduction direction of the voltage stabilizing circuit according to the related scheme for protecting the current limiting resistor from burning during voltage and current oscillation. The circuit for protecting the current-limiting resistor from being burnt out when the voltage and the current oscillate by the voltage stabilizing circuit in the related scheme is shown in fig. 4, when the motor normally operates, the external power supply inputs the positive direction (voltage and current), the input is limited by the current-limiting resistor D1, the diode M1 is conducted in the forward direction, the voltage of the voltage stabilizing diode D1 is stabilized, and the voltage is filtered by the nonpolar capacitor C and then is provided for the motor main control chip, at the moment, the voltage stabilizing diode D1 normally stabilizes the voltage, the voltage and the current direction of the current-limiting resistor R1 are positive and negative (positive voltage oscillation is shown in the short-dashed line conduction flow S1 in fig. 4).
If a diode is additionally added in front of the current-limiting resistor R1 on the basis of the related scheme, the unidirectional conductivity of the diode is utilized, when the oscillating negative voltage and current generated instantaneously by the switching element M are turned on and off, after the oscillating negative voltage and current flow through the voltage-stabilizing diode D1, the oscillating negative voltage and current cannot flow through the diode due to the unidirectional conductivity of the diode, so that the current-limiting resistor R1 cannot flow over the negative voltage and the negative current to burn out when the switching element M such as an alternating current contactor is turned on and off, and meanwhile, the current-limiting effect of the current-limiting resistor R1 on the related scheme of the current input port is ensured.
At the moment of motor on-off, the switching element M generates oscillating negative voltage b and negative heavy current, at the moment, the zener diode D1 is positively conducted (more than a is conducted), and the negative voltage and current oscillation cannot flow through the current limiting resistor R1 due to the unidirectional conductivity of the common diode M1, so that the current limiting resistor R1 is protected. However, at this moment, negative voltage oscillation generated instantly when the motor is turned on or off needs to find a path to release, because the current-limiting resistor is protected by the reverse insulation of the common diode M1, but the negative voltage oscillation is caused to flow into the motor controller to form a loop, and the motor control chip is damaged by large instant energy, so that the motor cannot work normally.
Considering that negative voltage and negative current are generated along with the repeated on-off of the motor and are uncontrollable, the power is often hundreds of times of rated power of the current limiting resistor, and the current limiting resistor is easy to burn. Therefore, it is needed to protect the current limiting resistor from being burnt out due to oscillation generated when switching devices such as ac contactors are turned on and off by circuit design and control methods, and meanwhile, it is needed and necessary that each function of the power input circuit is not affected. Therefore, the scheme of the invention designs the voltage stabilizing protection circuit for preventing the on-off faults of the motor by analyzing the principle that switching elements such as an alternating current contactor and the like generate voltage oscillation at the input power supply port of the motor controller, and the voltage stabilizing protection circuit can control the oscillating negative voltage and the oscillating negative current conduction direction at the on-off moment of the switching elements, so that the current limiting resistor of the voltage stabilizing circuit does not bear the oscillating voltage and does not pass through large oscillating current, the current limiting resistor is ensured not to be burnt out due to the on-off of the switching elements such as the alternating current contactor, and meanwhile, the current limiting effect of the current limiting resistor in the related scheme of the voltage stabilizing circuit is ensured, and various functions of the voltage stabilizing circuit are not influenced.
In some embodiments, the switching unit includes: a first switching element and a second switching element. The first switching element is arranged on a positive electrode connecting line of the output side of the external input power supply. The second switching element is arranged on a negative electrode connecting line of the output side of the external input power supply.
The cathode of the first zener diode unit is arranged at the output side of the first switching element.
The anode of the first zener diode unit is disposed at the output side of the second switching element.
The first end of the current limiting unit is arranged at the cathode of the first zener diode unit. A second end of the current limiting unit leads to the load supply port.
The voltage stabilizing protection circuit for preventing the on-off faults of the motor can control the negative voltage and negative current oscillation not to flow through the current limiting resistor R1 of the voltage stabilizing circuit at the on-off moment of the switching element M such as an alternating current contactor and the like, and ensure that the current limiting resistor R1 of the voltage stabilizing circuit cannot be damaged when the switching element M such as the alternating current contactor is on-off. Meanwhile, when the motor normally operates, the current limiting function of a related scheme of the current limiting resistor R1 of the voltage stabilizing protection circuit in the voltage stabilizing circuit is not affected, so that various functions (voltage stabilizing, current limiting, filtering and the like) in the voltage stabilizing circuit are ensured to normally operate at the moment of switching on and off of the motor and during long-term operation, and the cost of the whole circuit is not increased. Therefore, the problem that when the motor executes an action sequence through a switching device (namely a switching element M) such as an alternating current contactor and the like, the switching device such as the alternating current contactor and the like generates large oscillating negative voltage and negative current when being switched on and switched off due to internal mechanical parts, the oscillating negative voltage and negative current lead to forward conduction of the zener diode D1, so that the current limiting resistor R1 bears large negative voltage and excessive negative current, the current limiting resistor R1 is burnt, and a power input circuit cannot work, namely the motor is stopped due to faults is solved.
Compared with the forward conduction, reverse cut-off and unidirectional conduction of a common diode (such as the diode M1), the forward characteristic of the zener diode (such as the zener diode D1) is the same as that of the common diode, but the reverse characteristic is quite special, when the reverse voltage of the zener diode D1 is added to a certain degree, the tube can pass larger current but is not damaged although the tube is in a breakdown state, and the repeatability of the phenomenon is quite good, as long as the zener diode D1 is in the breakdown state, the current flowing through the zener diode is quite large, and the voltage at two ends of the zener diode D1 is quite small, so that the voltage stabilizing effect can be achieved.
In some embodiments, further comprising: magnetic bead units such as magnetic bead L1. The magnetic bead unit is arranged on the output side of the current limiting unit.
In the examples shown in fig. 5 and 6, the magnetic beads L1 are dedicated to suppressing high frequency noise and spike interference of the voltage stabilizing circuit, and also have the capability of absorbing electrostatic pulses.
In some embodiments, further comprising: the filter unit, such as the nonpolar capacitor C1, the nonpolar capacitor C1 plays a role in filtering. The filtering unit is positioned on the output side of the current limiting unit and is arranged between the input side of the load power supply port and the ground.
In some embodiments, further comprising: the filter unit, such as the nonpolar capacitor C1, the nonpolar capacitor C1 plays a role in filtering. The filtering unit is positioned on the output side of the magnetic bead unit and is arranged between the input side of the load power supply port and the ground.
Fig. 5 is a schematic diagram of a voltage stabilizing circuit according to an embodiment of the invention. As shown in fig. 5, the voltage stabilizing protection circuit designed by the scheme of the invention can realize the forced voltage stabilizing effect of negative voltage oscillation and negative current oscillation at the power input end of the motor controller, so that the current limiting resistor R1 can not be burnt out due to oscillation generated when switching devices such as an alternating current contactor are switched on and off, meanwhile, when the motor normally operates, the current limiting effect of the voltage stabilizing protection circuit current limiting resistor R1 in the related scheme of a current input port is not affected, each function (voltage stabilizing, current limiting and the like) of the power input circuit is ensured to normally operate at the moment of switching on and off of the motor and during long-term operation, the circuit is composed of an external power input, a switching element (such as an alternating current contactor and the like) M1, a current limiting resistor R1, a magnetic bead L1, a voltage stabilizing diode D1, a non-polar capacitor C1, a ground GND and a power input port 2 of the motor main control chip, wherein the switching element (such as the alternating current contactor and the like) can generate oscillation negative voltage and negative current when switching, the resistor R1 is a current limiting resistor, and the voltage stabilizing diode D1 plays a role in stabilizing, and the scheme of the voltage stabilizing is particularly that the voltage stabilizing diode D1 is firstly performed when the current limiting resistor R1 is switched on in the circuit, namely before the current limiting resistor R1 is input in the circuit, and the current limiting effect is performed by the voltage stabilizing diode D1.
FIG. 6 is a schematic diagram of the voltage conduction direction of the voltage stabilizing protection circuit during voltage oscillation. As shown in fig. 6, when the motor normally operates, the external power input (voltage and current) is in the positive direction, the input is subjected to current limiting through a current limiting resistor R1, voltage stabilization by a voltage stabilizing diode D1 and filtering by a nonpolar capacitor C1, and then the input is provided to the motor main control chip, at this time, the voltage stabilizing diode D1 normally stabilizes voltage, the current limiting resistor R1 has a voltage and current direction of a positive direction B negative (positive voltage oscillation is shown in fig. 6, but short-dashed line conduction flow S1).
When the oscillation voltage generated by the power input end is greater than the working voltage of the zener diode D1, the zener diode D1 acts preferentially, and the effect is that the instantaneous oscillation voltage is stabilized to a preset voltage stabilizing value, and the oscillation voltage which is maintained to the voltage stabilizing value supplies power to the power input port 2 of the motor main control chip after the action of the current limiting resistor R1, the magnetic bead L1 and the filtering nonpolar capacitor C1. When the generated oscillation voltage is smaller than the working voltage of the zener diode D1, the zener diode D1 does not act, and the oscillation voltage lower than the voltage stabilizing value supplies power to the power input port 2 of the motor main control chip after being acted by the current limiting resistor R1, the magnetic beads L1 and the filtering nonpolar capacitor C1.
In the moment of motor on-off, because the motor running switch element (such as an alternating current contactor) M1 on-off action is executed by a mechanical structure, instantaneous negative voltage and negative current oscillation can be generated during mechanical on-off, at the moment, the voltage stabilizing diode is positively conducted (more than a is conducted), the oscillating negative voltage B and negative large current directly flow out of the voltage stabilizing circuit after passing through the voltage stabilizing tube, at the moment, the voltage and current direction of the current limiting resistor R1 are A positive and B negative, the power supply input circuit works normally, and the motor runs normally (the negative voltage oscillation is shown in a long-dashed line conduction flow S2 in FIG. 6).
Through the actions, the voltage of the current-limiting resistor R1 is stable and within the rated power requirement, the voltage stabilizing circuit works normally when the motor is turned on or off, the current-limiting resistor R1 is ensured not to be burnt out due to overlarge negative voltage oscillation and negative current oscillation generated when switching devices such as an alternating current contactor are turned on or off, and meanwhile, the current-limiting effect of the current-limiting resistor R1 in a related scheme of a current input port is ensured, and various functions of the power input circuit are not affected.
In some embodiments, the current limiting unit includes: a current limiting resistor. The number of the current limiting resistors is more than one. And under the condition that the number of the current limiting resistors is more than two, more than two current limiting resistors are arranged in parallel.
In some alternative embodiments, more than 2 current limiting resistors R1 may be connected in parallel, so as to ensure that the zener diode is turned on in the forward direction due to the negative voltage when the switching element M1 such as the ac contactor is turned on or off, and the current limiting resistor R1 will not burn out due to the negative voltage and negative current.
According to the scheme of the invention, the voltage-stabilizing diode D1 is connected into the circuit before the current-limiting resistor R1, namely when external voltage is input, the voltage-stabilizing diode D1 is subjected to the current-limiting effect of the current-limiting resistor R1. In the moment of motor on-off, because the on-off action of the motor operation switching element (such as an alternating current contactor and the like) is executed by a mechanical structure, the instantaneous oscillation negative voltage and negative current oscillation can be generated during the mechanical on-off, at the moment, the voltage stabilizing diode is positively conducted (more than a is conducted), the oscillation negative voltage B and negative large current directly flow out of the voltage stabilizing circuit after passing through the voltage stabilizing tube, at the moment, the voltage and current direction of the current limiting resistor R1 are A positive and B negative, the power input circuit works normally, and the motor operates normally. The voltage stabilizing circuit works normally when the motor is switched on and off, so that the current limiting resistor is prevented from being burnt out due to overlarge negative voltage oscillation and negative current oscillation generated when switching devices such as an alternating current contactor are switched on and off, and meanwhile, the current limiting function of the current limiting resistor R1 in a related scheme of a current input port is ensured, and various functions of the power input circuit are not affected.
In some embodiments, further comprising: a second zener diode unit, such as another zener diode provided at the rear end of the current limiting resistor R1 in the example shown in fig. 5 and 6.
The second zener diode unit is arranged at the output side of the current limiting unit.
The cathode of the second zener diode unit is arranged at the second end of the current limiting unit. And the anode of the second zener diode unit is grounded.
In some alternative embodiments, a zener diode D1 may be additionally added before the current-limiting resistor R1 of the circuit base of the related scheme to absorb the oscillating negative voltage and current generated instantaneously by the on-off of the switching element M1, and more than 2 current-limiting resistors R1 are connected in parallel at the same time, so that the forward conduction of the zener diode due to the negative voltage when the switching element M1 such as an ac contactor is on-off is ensured, the current-limiting resistor R1 cannot flow through the negative voltage and negative current to burn out, and meanwhile, the current-limiting effect of the current-limiting resistor R1 in the related scheme of the current input port is ensured.
According to the scheme of the invention, the positions of the current limiting resistors R1 are compared, the circuit generating negative voltage/negative current oscillation is compared, and the voltage stabilizing circuit is judged, so that the current limiting resistors R1 of the voltage stabilizing circuit are controlled not to flow through the current limiting resistors R1 of the voltage stabilizing circuit at the moment of switching on and off of the switching element M1, and the current limiting resistors R1 of the voltage stabilizing circuit are prevented from being damaged when the switching element M1 such as an alternating current contactor is switched on and off. Meanwhile, when the motor normally operates, the current limiting function of a related scheme of the current limiting resistor R1 of the voltage stabilizing protection circuit in the voltage stabilizing circuit is not affected, so that various functions (voltage stabilizing, current limiting, filtering and the like) in the voltage stabilizing circuit are ensured to normally operate at the moment of switching on and off of the motor and during long-term operation, and the cost of the whole circuit is not increased.
By adopting the technical scheme of the invention, after an external input power supply is input into the motor controller in the voltage stabilizing circuit of the motor controller, voltage and current are provided for the motor main control chip through the voltage stabilizing diode, the current limiting resistor and other elements, so that the motor conducts through the voltage stabilizing diode and does not flow through the current limiting resistor due to the oscillating negative voltage and negative current generated when the motor is switched on and switched off by the alternating current contactor and other switching elements; therefore, the current limiting resistor which does not flow through the voltage stabilizing circuit is controlled to be negative voltage and negative current oscillation at the moment of switching on and off of the switching elements such as the alternating current contactor, so that the current limiting resistor can be prevented from being burnt out, and further the motor is prevented from being stopped due to faults.
According to an embodiment of the present invention, there is also provided a motor controller corresponding to the voltage stabilizing protection device. The motor controller may include: the voltage stabilizing protection device is described above.
Since the processes and functions implemented by the motor controller of the present embodiment basically correspond to the embodiments, principles and examples of the apparatus, the description of the present embodiment is not exhaustive, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
By adopting the technical scheme of the invention, after an external input power supply is input into the motor controller in the voltage stabilizing circuit of the motor controller, voltage and current are provided for the motor main control chip through the voltage stabilizing diode, the current limiting resistor and other elements, so that the motor conducts oscillating negative voltage and negative current generated when the tool is turned on and off through the switching element such as an alternating current contactor and the like, and does not flow through the current limiting resistor, and each function (voltage stabilizing, current limiting, filtering and the like) in the voltage stabilizing circuit is ensured to normally work at the moment of motor on and off and during long-term operation.
There is also provided, in accordance with an embodiment of the present invention, a motor corresponding to the motor controller. The motor may include: the motor controller described above.
Since the processes and functions implemented by the motor of the present embodiment substantially correspond to the embodiments, principles and examples of the motor controller described above, the description of the present embodiment is not exhaustive, and reference may be made to the related descriptions of the foregoing embodiments, which are not repeated herein.
By adopting the technical scheme of the embodiment, after an external input power supply is input into the motor controller in the voltage stabilizing circuit of the motor controller, voltage and current are provided for the motor main control chip through the voltage stabilizing diode, the current limiting resistor and other elements, so that oscillating negative voltage and negative current generated when the motor is switched on and switched off by the alternating current contactor and other switching elements, are conducted through the voltage stabilizing diode, and cannot flow through the current limiting resistor, and the whole circuit is low in cost.
In summary, it is readily understood by those skilled in the art that the above-described advantageous ways can be freely combined and superimposed without conflict.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. The voltage stabilizing protection device is characterized by being applicable between an external input power supply and a load power supply port; the voltage stabilizing protection device comprises: the switching unit, the first zener diode unit and the current limiting unit; wherein,
the switch unit is arranged on the output side of the external input power supply;
the first zener diode unit is arranged at the output side of the switch unit;
the current limiting unit is arranged between the first zener diode unit and the load power supply port;
at the moment of switching on and off of the switching unit, the oscillating negative voltage and the oscillating negative current generated by the switching unit can pass through the first voltage-stabilizing diode unit and then pass through the current-limiting unit; the first end of the current limiting unit is arranged at the cathode of the first zener diode unit; the second end of the current limiting unit is communicated with the load power supply port; the anode of the first zener diode unit is grounded;
further comprises: a magnetic bead unit; the magnetic bead unit is arranged on the output side of the current limiting unit;
further comprises: a filtering unit; the filtering unit is positioned on the output side of the current limiting unit and is arranged between the input side of the load power supply port and the ground;
further comprises: a second zener diode unit; the second zener diode unit is arranged at the output side of the current limiting unit;
in the voltage stabilizing protection device of the motor controller, after an external input power supply is input to the motor controller, voltage and current are provided for a motor main control chip through the first voltage stabilizing diode unit and then the current limiting unit, so that oscillating negative voltage and negative current generated when the motor is switched on and switched off through the switching unit are conducted through the first voltage stabilizing diode unit and cannot flow through the current limiting unit; therefore, by controlling the negative voltage and negative current oscillation not to flow through the current limiting unit at the moment of switching on and switching off of the switching unit, the current limiting unit can be prevented from being burnt out, and further the motor is prevented from being stopped due to faults.
2. The voltage stabilizing protection device according to claim 1, wherein the switching unit comprises: a first switching element and a second switching element; the first switching element is arranged on a positive electrode connecting line of the output side of the external input power supply; the second switching element is arranged on a negative electrode connecting line of the output side of the external input power supply;
the cathode of the first zener diode unit is arranged at the output side of the first switching element;
the anode of the first zener diode unit is arranged at the output side of the second switching element;
the cathode of the second zener diode unit is arranged at the second end of the current limiting unit; and the anode of the second zener diode unit is grounded.
3. The voltage regulator protection device of claim 1, further comprising: a filtering unit;
the filtering unit is positioned on the output side of the magnetic bead unit and is arranged between the input side of the load power supply port and the ground.
4. The voltage regulation protection device of claim 1, wherein the current limiting unit comprises: a current limiting resistor; the number of the current limiting resistors is more than one;
and under the condition that the number of the current limiting resistors is more than two, more than two current limiting resistors are arranged in parallel.
5. A motor controller, comprising: the voltage stabilizing protecting device of any one of claims 1 to 4.
6. An electric machine, comprising: the motor controller of claim 5.
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| CN202111555841.5A CN114362500B (en) | 2021-12-17 | 2021-12-17 | Voltage stabilization protection device, motor controller and motor |
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| CN202111555841.5A CN114362500B (en) | 2021-12-17 | 2021-12-17 | Voltage stabilization protection device, motor controller and motor |
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| CN114362500B true CN114362500B (en) | 2023-11-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH052462U (en) * | 1991-06-21 | 1993-01-14 | 株式会社アドバンテスト | Line control device |
| CN104659774A (en) * | 2015-02-11 | 2015-05-27 | 深圳市航盛电子股份有限公司 | Low-voltage input power supply port protection circuit |
| KR20170028217A (en) * | 2015-09-03 | 2017-03-13 | 엘에스산전 주식회사 | Charging apparatus for gate unit of high voltage direct current system |
| CN110676801A (en) * | 2019-09-18 | 2020-01-10 | 无锡盛景电子科技有限公司 | Anti-oscillation overvoltage protection circuit |
| CN209994105U (en) * | 2019-06-20 | 2020-01-24 | 深圳市中创工业互联网有限公司 | Hot plug protection circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635459B (en) * | 2009-08-14 | 2011-08-10 | 深圳和而泰智能控制股份有限公司 | Switch for the access of single phase wire |
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2021
- 2021-12-17 CN CN202111555841.5A patent/CN114362500B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH052462U (en) * | 1991-06-21 | 1993-01-14 | 株式会社アドバンテスト | Line control device |
| CN104659774A (en) * | 2015-02-11 | 2015-05-27 | 深圳市航盛电子股份有限公司 | Low-voltage input power supply port protection circuit |
| KR20170028217A (en) * | 2015-09-03 | 2017-03-13 | 엘에스산전 주식회사 | Charging apparatus for gate unit of high voltage direct current system |
| CN209994105U (en) * | 2019-06-20 | 2020-01-24 | 深圳市中创工业互联网有限公司 | Hot plug protection circuit |
| CN110676801A (en) * | 2019-09-18 | 2020-01-10 | 无锡盛景电子科技有限公司 | Anti-oscillation overvoltage protection circuit |
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| CN114362500A (en) | 2022-04-15 |
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