CN112186717A - Power protection circuit and robot arm - Google Patents
Power protection circuit and robot arm Download PDFInfo
- Publication number
- CN112186717A CN112186717A CN201910597580.XA CN201910597580A CN112186717A CN 112186717 A CN112186717 A CN 112186717A CN 201910597580 A CN201910597580 A CN 201910597580A CN 112186717 A CN112186717 A CN 112186717A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- protection circuit
- power
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 20
- 230000000740 bleeding effect Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 description 28
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to the technical field of motor power supplies, and provides a power supply protection circuit and a mechanical arm. The power protection circuit includes: a first power supply circuit; a second power supply circuit; the power supply protection circuit is connected between the first power supply circuit and the output end of the power supply protection circuit and used for cutting off the power supply of the first power supply circuit when the power supply of the first power supply circuit is abnormal; the controller is respectively connected with the first power supply circuit, the second power supply circuit and the power supply protection circuit and is used for detecting power supply parameters of the first power supply circuit and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal so that the power supply protection circuit cuts off the power supply of the first power supply circuit; the second power supply circuit is used for supplying power to the controller. The invention realizes dual power supply and has a hardware and software dual protection mechanism.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of motor power supplies, in particular to a power supply protection circuit and a mechanical arm.
[ background of the invention ]
Because some unstable factors exist in the power supply, in order to prevent the unstable factors from affecting a circuit to be supplied with power or equipment to be supplied with power (such as a robot arm, etc.), a power protection circuit is provided, which is generally a hardware protection circuit, and is used for realizing overcurrent protection, overvoltage protection, slow start, etc.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems: at present, a device to be powered corresponds to a power supply, the power supply simultaneously supplies power to the device to be powered and a controller of the device to be powered, and the device to be powered, which is powered by a single power supply, is only provided with a hardware protection circuit, so that when the corresponding hardware protection circuit fails or has reduced sensitivity, reliability is reduced, and even potential safety hazards are caused.
[ summary of the invention ]
In order to solve the technical problem, embodiments of the present invention provide a power protection circuit and a mechanical arm, which can implement dual power supply and have a dual protection mechanism of hardware and software, thereby improving reliability.
To solve the above technical problem, an embodiment of the present invention provides a power protection circuit, including:
a first power supply circuit;
a second power supply circuit;
the power supply protection circuit is connected between the first power supply circuit and the output end of the power supply protection circuit and used for cutting off the power supply of the first power supply circuit when the power supply of the first power supply circuit is abnormal;
the controller is respectively connected with the first power supply circuit, the second power supply circuit and the power supply protection circuit and is used for detecting power supply parameters of the first power supply circuit and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal so that the power supply protection circuit cuts off the power supply of the first power supply circuit;
the second power supply circuit is used for supplying power to the controller.
Optionally, the power protection circuit further includes a first feeding protection circuit and a bleeding circuit;
the first feed protection circuit is connected with the output end of the power supply protection circuit and the bleeder circuit, and is used for starting the bleeder circuit to discharge feed energy from the output end of the power supply protection circuit when the voltage of the output end of the power supply protection circuit is greater than a first preset reference voltage;
the bleeder circuit is also connected with the power protection circuit output end and is used for discharging the feed energy from the power protection circuit output end.
Optionally, the power protection circuit further includes a second feeding protection circuit, the second feeding protection circuit is connected to the controller and the bleeding circuit, the controller is connected to the power protection circuit output end, the controller is further configured to detect a voltage at the power protection circuit output end, and when the voltage at the power protection circuit output end is greater than a second preset reference voltage and the first feeding protection circuit works abnormally, the controller sends a control signal to the second feeding protection circuit, so that the second feeding protection circuit starts the bleeding circuit to bleed the feeding energy from the power protection circuit output end.
Optionally, the bleeder circuit comprises a first MOS transistor and a first resistor;
the grid electrode of the first MOS tube is connected with the first feed protection circuit, the drain electrode of the first MOS tube is connected with the output end of the power supply protection circuit, and the source electrode of the first MOS tube is connected with one end of the first resistor;
the other end of the first resistor is connected with the ground end.
Optionally, the first feeding protection circuit comprises a comparator, a first diode, a second resistor, a third resistor and a fourth resistor;
a first port of the comparator is connected with an output end of the power protection circuit, a second port of the comparator is used for receiving the first preset reference voltage, a third port of the comparator is used for receiving a first direct-current voltage, a fourth port of the comparator is connected with a ground end, and a fifth port of the comparator is connected with an anode of the first diode and one end of the second resistor;
the cathode of the first diode is connected with one end of the fourth resistor and the bleeder circuit;
the other end of the second resistor is connected with one end of the third resistor;
the other end of the third resistor is connected with the ground end; the other end of the fourth resistor is connected with the ground end.
Optionally, the second feeding protection circuit includes a first PNP transistor, a first NPN transistor, and a fifth resistor;
a base electrode of the first PNP triode is connected to a collector electrode of the first NPN triode and one end of the fifth resistor, the collector electrode of the first PNP triode is connected to the bleeder circuit, an emitter electrode of the first PNP triode is connected to the other end of the fifth resistor, and the emitter electrode of the first PNP triode is used for receiving a second direct-current voltage;
the base electrode of the first NPN triode is connected with the controller, and the emitting electrode of the first NPN triode is connected with the ground end.
Optionally, the power protection circuit further includes:
the first current detection circuit is respectively connected with the power supply protection circuit, the output end of the power supply protection circuit and the controller, and is used for detecting the output current of the output end of the power supply protection circuit and sending the output current to the controller;
the second current detection circuit is respectively connected with the first current detection circuit, the bleeder circuit and the controller, and is used for detecting the feed current flowing through the bleeder circuit and sending the feed current to the controller;
the controller is further configured to detect an output voltage at an output end of the power protection circuit, calculate real-time power consumption according to the output voltage and the output current, and cut off the first power circuit when the real-time power consumption is abnormal.
Optionally, the power protection circuit further comprises a first anti-reverse connection circuit and a second anti-reverse connection circuit;
the first reverse connection prevention circuit is connected between the first power supply circuit and the power supply protection circuit;
the second anti-reverse connection circuit is connected between the second power supply circuit and the controller.
Optionally, the power protection circuit further includes a communication circuit, and the communication circuit is connected to the controller.
The embodiment of the invention also provides a robot arm which comprises the power supply protection circuit.
The invention has the beneficial effects that: compared with the prior art, the embodiment of the invention provides a power protection circuit and a mechanical arm. When the power supply of the first power supply circuit is abnormal, the power supply protection circuit cuts off the power supply of the first power supply circuit, so that the hardware protection of the first power supply circuit is realized; and detecting the power supply parameters of the first power supply circuit through the controller, and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal, so that the power supply protection circuit cuts off the power supply of the first power supply circuit, thereby realizing the software protection of the first power supply circuit. Therefore, the invention can realize dual power supply and has a hardware and software dual protection mechanism, thereby improving the reliability. In addition, the controller is provided with a second power supply circuit which supplies power independently, and when the power supply of the first power supply circuit is abnormal, the software protection of the controller is not influenced, so that the reliability of the protection circuit is further improved.
[ description of the drawings ]
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a power protection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power protection circuit according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power protection circuit according to another embodiment of the present invention;
fig. 4 is a schematic circuit connection diagram of a first feeding protection circuit, a second feeding protection circuit and a bleeding circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit connection diagram of a first anti-reverse connection circuit and a power supply protection circuit according to an embodiment of the present invention.
[ detailed description ] embodiments
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic structural diagram of a power protection circuit according to an embodiment of the present invention. As shown in fig. 1, the power protection circuit 100 includes a first power circuit 101, a second power circuit 102, a power protection circuit 103, and a controller 104.
The first power circuit 101 is a main power supply and is configured to supply power to a circuit to be powered or a device to be powered, and the second power circuit 102 is configured to supply power to the controller 104.
The first power supply circuit 101 and the second power supply circuit 102 may be classified into a direct current power supply or an alternating current power supply according to a voltage output type. The first power circuit 101 and the second power circuit 102 are commonly in the form of a storage battery, an alternating current commercial power, and the like, and it is understood that the first power circuit 101 and the second power circuit 102 may also be in the form of a switching power supply, an inverter power supply, an alternating current stabilized power supply, a direct current stabilized power supply, a DC/DC power supply, a module power supply, a variable frequency power supply, a UPS power supply, a linear power supply, a voltage regulation power supply, a transformer power supply, and the like. The power supply parameters of the first power circuit 101 and the second power circuit 102 may include one or more of input current, power-on start-up current, ripple current, output voltage, voltage dynamic response time, power supply temperature, dielectric strength, power factor, harmonic component, and power supply lifetime.
The power supply protection circuit 103 is connected between the first power circuit 101 and the power supply protection circuit output terminal 10, and is configured to cut off power supply of the first power circuit 101 when power supply of the first power circuit 101 is abnormal.
As shown in fig. 5, the power supply protection circuit 103 includes a power supply protection chip U2, a second MOS transistor Q4 and a sixth resistor R6, and when the power supply protection chip U2 outputs a high level signal, the second MOS transistor Q4 is turned on, so that the drain of the second MOS transistor Q4 and the source of the second MOS transistor Q4 are turned on, and the first power supply circuit 101 and the power supply loop of the power supply protection circuit output terminal 10 are turned on, so that the output of the first power supply circuit 101 is enabled. When the power protection chip U2 outputs a low level signal, the second MOS transistor Q4 is turned off, so that the drain of the second MOS transistor Q4 is insulated from the source of the second MOS transistor Q4, and the power supply circuit between the first power circuit 101 and the power protection circuit output terminal 10 is disconnected, thereby cutting off the power supply of the first power circuit 101.
Specifically, the power supply protection circuit 103 can realize pure hardware protection functions such as circuit slow start, overvoltage protection, overcurrent protection and the like according to the detection result of the power supply protection chip U2 on the first power supply circuit 101. The power supply protection circuit 103 may further cut off the second MOS transistor Q4 when the back-end circuit is short-circuited according to a detection result of the power supply protection chip U2 on the back-end circuit, thereby implementing a short-circuit protection function. According to the power supply parameter of the first power circuit 101, when the power supply of the first power circuit 101 is abnormal, the controller 104 sends an enable signal to the power supply protection circuit 103, so that the power supply protection circuit 103 cuts off the power supply of the first power circuit 101, thereby realizing the software protection of the controller on the power supply.
The controller 104 is connected to the first power circuit 101, the second power circuit 102, and the power protection circuit 103, and configured to detect a power supply parameter of the first power circuit 101, and send an enable signal to the power protection circuit 103 when power supply of the first power circuit 101 is abnormal, so that the power protection circuit 103 cuts off power supply of the first power circuit 101.
Wherein the controller 104 includes at least one processor and a memory communicatively coupled to the at least one processor. Wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to send an enable signal to the power supply protection circuit 103 to cause the power supply protection circuit 103 to cut off the power supply of the first power circuit 101 when an abnormality occurs in the power supply of the first power circuit 101 according to the power supply parameters of the first power circuit 101.
In some embodiments, the controller 104 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a single chip, an arm (acorn RISC machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. The controller 104 may be any conventional processor, controller, microcontroller, or state machine.
The embodiment of the invention provides a power supply protection circuit, which cuts off the power supply of a first power supply circuit when the power supply of the first power supply circuit is abnormal through a power supply protection circuit, thereby realizing the hardware protection of the first power supply circuit; and detecting the power supply parameters of the first power supply circuit through the controller, and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal, so that the power supply protection circuit cuts off the power supply of the first power supply circuit, thereby realizing the software protection of the first power supply circuit. Therefore, the invention can realize dual power supply and has a hardware and software dual protection mechanism, thereby improving the reliability. In addition, the controller is provided with a second power supply circuit which supplies power independently, and when the power supply of the first power supply circuit is abnormal, the software protection of the controller is not influenced, so that the reliability of the protection circuit is further improved.
Fig. 2 is a schematic structural diagram of a power protection circuit according to another embodiment of the present invention. As shown in fig. 2, the power protection circuit 200 includes, in addition to the first power circuit 101, the second power circuit 102, the power supply protection circuit 103 and the controller 104 included in the power protection circuit 100, a first feeding protection circuit 201, a bleeding circuit 202, a second feeding protection circuit 203, a first current detection circuit 204, a second current detection circuit 205, a first reverse connection prevention circuit 206, a second reverse connection prevention circuit 207 and a communication circuit 208.
The first feeding protection circuit 201 is connected to the power protection circuit output terminal 10 and the bleeder circuit 202, and the first feeding protection circuit 201 is configured to start the bleeder circuit 202 to bleed feeding energy from the power protection circuit output terminal 10 when the voltage at the power protection circuit output terminal 10 is greater than a first preset reference voltage, so as to implement feeding discharge hardware protection.
Referring to fig. 4, the first feeding protection circuit 201 includes a comparator U1, a first diode D1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
A first port 1 of the comparator U1 is connected to the power protection circuit output terminal 10, a second port 2 of the comparator U1 is configured to receive the first preset reference voltage, a third port 3 of the comparator U1 is configured to receive a first direct current voltage, a fourth port 4 of the comparator U1 is connected to ground, and a fifth port 5 of the comparator U1 is connected to the anode of the first diode D1 and one end of the second resistor R2; the cathode of the first diode D1 is connected with one end of the fourth resistor R4 and the bleeder circuit 202; the other end of the second resistor R2 is connected with one end of the third resistor R3; the other end of the third resistor R3 is connected with the ground end; the other end of the fourth resistor R4 is connected with the ground terminal.
The second feeding protection circuit 203 is connected to the controller 104 and the bleeding circuit 202, the controller 104 is connected to the output end 10 of the power protection circuit, the controller 104 is further configured to detect a voltage of the output end 10 of the power protection circuit, and when the voltage of the output end 10 of the power protection circuit is greater than a second preset reference voltage and the first feeding protection circuit 201 works abnormally, the controller sends a control signal to the second feeding protection circuit 203, so that the second feeding protection circuit 203 starts the bleeding circuit 202 to bleed off feeding energy from the output end 10 of the power protection circuit, thereby implementing software protection of feeding, bleeding and discharging.
It should be noted that the first preset reference voltage and the second preset reference voltage may be the same or different. Preferably, the first preset reference voltage is smaller than the second preset reference voltage, so that the first feed protection circuit 201 plays a role of hardware protection first during feed leakage protection, and the second feed protection circuit 203 can still play a role of software protection when the first feed protection circuit 201 works abnormally, thereby realizing dual protection of hardware and software, and further improving reliability.
The second feed protection circuit 203 includes a first PNP transistor Q2, a first NPN transistor Q3, and a fifth resistor R5.
A base electrode of the first PNP transistor Q2 is connected to a collector electrode of the first NPN transistor Q3 and one end of the fifth resistor R5, a collector electrode of the first PNP transistor Q2 is connected to a cathode of the first diode D1 and a gate electrode of the first MOS transistor Q1, an emitter electrode of the first PNP transistor Q2 is connected to the other end of the fifth resistor R5, and an emitter electrode of the first PNP transistor Q2 is configured to receive a second direct-current voltage; the base of the first NPN transistor Q3 is connected to the controller 104, and the emitter of the first NPN transistor Q3 is connected to ground. The second dc voltage and the first dc voltage may be the same dc voltage, that is, the emitter of the first PNP transistor Q2 is connected to the third port 3 of the comparator U1.
In this embodiment, the second resistor R2 and the third resistor R3 are a voltage sampling circuit, a connection point of the second resistor R2 and the third resistor R3 is connected to the controller 104, and the operating state of the first feeding protection circuit 201 is determined according to the voltage division of the second resistor R2 and the third resistor R3. When the voltage at the output end 10 of the power protection circuit is greater than a second preset reference voltage and the first feed protection circuit 201 works abnormally, the controller 104 sends a control signal to the second feed protection circuit 203, the control signal acts on the base of the first NPN triode Q3, the first NPN triode Q3 is turned on, the base voltage of the first PNP triode Q2 is pulled to 0 potential, the first PNP triode Q2 meets the conduction condition, outputs a high-level signal to the gate of the first MOS transistor Q1, and turns on the first MOS transistor Q1, so as to start the bleeder circuit 202 to bleed off the feed energy from the second power circuit 102.
It can be understood that, if the first preset reference voltage is smaller than the second preset reference voltage, the first feeding protection circuit 201 is activated in preference to the second feeding protection circuit 203, so as to implement hardware protection of the feeding circuit. When the first feeding protection circuit 201 works in a normal state, and when the voltage of the output end 10 of the power protection circuit is greater than a first preset reference voltage, the first feeding protection circuit 201 triggers and starts the bleeder circuit 202 to bleed feeding energy from the output end 10 of the power protection circuit. When the first feeding protection circuit 201 works abnormally, when the voltage of the output end 10 of the power supply protection circuit is greater than the first preset reference voltage, the first feeding protection circuit 201 does not respond, the voltage of the output end 10 of the power supply protection circuit continues to rise, and when the voltage of the output end 10 of the power supply protection circuit is greater than the second preset reference voltage, the controller 104 sends a control signal to the second feeding protection circuit 203, so that the second feeding protection circuit 203 starts the bleeder circuit 202 to bleed off the feeding energy from the output end 10 of the power supply protection circuit, and the software protection of feeding discharge is realized.
In some embodiments, if the first preset reference voltage is equal to the second preset reference voltage, the priority of the first feeding protection circuit 201 is higher than the priority of the second feeding protection circuit 203 according to the priority set by the system. When the first feeding protection circuit 201 works in a normal state, and when the voltage of the output end 10 of the power supply protection circuit is greater than the first preset reference voltage or the second preset reference voltage, the first feeding protection circuit 201 triggers and starts the bleeding circuit 202 to bleed the feeding energy from the output end 10 of the power supply protection circuit, so as to realize the hardware protection of the feeding circuit. When the first feeding protection circuit 201 works abnormally, when the voltage of the output end 10 of the power supply protection circuit is greater than the first preset reference voltage or the second preset reference voltage, the controller 104 sends a control signal to the second feeding protection circuit 203, so that the second feeding protection circuit 203 starts the bleeding circuit 202 to bleed the feeding energy from the output end 10 of the power supply protection circuit, and the software protection of feeding discharge is realized.
The bleeder circuit 202 is further connected to the power protection circuit output 10, and the bleeder circuit 202 is configured to bleed off feeding energy from the power protection circuit output 10.
The bleeder circuit comprises a first MOS transistor Q1 and a first resistor R1, wherein the first resistor R1 is a cement resistor and is suitable for a high-power and high-current bleeder branch. Specifically, the gate of the first MOS transistor Q1 is connected to the first feeding protection circuit 201 and the second feeding protection circuit 203, the drain of the first MOS transistor Q1 is connected to the output terminal 10 of the power protection circuit, the source of the first MOS transistor Q1 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to ground.
The first current detection circuit 204 is connected to the power supply protection circuit 103, the power supply protection circuit output terminal 10, and the controller 104, and is configured to detect an output current of the power supply protection circuit output terminal 10 and send the output current to the controller 104.
The second current detection circuit 205 is respectively connected to the first current detection circuit 204, the bleeder circuit 202 and the controller 104, and is configured to detect a feeding current flowing through the bleeder circuit 202 and send the feeding current to the controller 104. The controller 104 is further configured to detect an output voltage of the output terminal 10 of the power protection circuit, calculate real-time power consumption according to the output voltage and the output current, and cut off the first power circuit 101 when the real-time power consumption is abnormal.
In this embodiment, the first current detection circuit 204 and the second current detection circuit 205 may both employ a current detection chip ACS 712.
The first reverse connection prevention circuit 206 is connected between the first power supply circuit 101 and the power supply protection circuit 103.
As shown in fig. 5, the first anti-reverse connection circuit 206 includes a third MOS transistor Q5, a seventh resistor R7 and an eighth resistor R8, wherein the gate of the third MOS transistor Q5 is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, the drain of the third MOS transistor Q5 is connected to the first power circuit 101, the source of the third MOS transistor Q5 is connected to the other end of the seventh resistor R7, the power supply protection chip U2 and the sixth resistor, and the other end of the eighth resistor R8 is connected to ground.
The second anti-reverse connection circuit 207 is connected between the second power supply circuit 102 and the controller 104. In this embodiment, the second anti-reverse connection circuit 207 includes a second diode (not shown), which reduces the cost of circuit design and is suitable for a circuit with a smaller current than the first anti-reverse connection circuit 206.
The communication circuit 208 is connected to the controller 104. In this embodiment, the communication circuit 208 supports an RS485 communication interface, and is used to connect an external device and the controller 104 in a communication manner, and implement data exchange between the two devices.
Fig. 3 is a schematic structural diagram of a power protection circuit according to another embodiment of the present invention. As shown in fig. 3, the power protection circuit 300 includes, in addition to the circuit modules of the power protection circuit 200, a first sampling circuit 301, a second sampling circuit 302, a third sampling circuit 303, a first dc voltage circuit 304, a first preset reference voltage circuit 305, and a voltage reduction and stabilization circuit 306.
The first sampling circuit 301 is connected to the first power circuit 101, the first anti-reverse connection circuit 206 and the controller 104, and is configured to collect power supply parameters of the first power circuit 101.
In this embodiment, the first sampling circuit 301 is a voltage sampling circuit, and includes two resistors (not shown) connected in series, the resistor dividing point is connected to the controller 104, and the controller 104 receives a power supply parameter sampled by the first sampling circuit 301, where the power supply parameter is a voltage parameter.
It can be understood that the circuit form of the first sampling circuit 301 varies according to the power supply parameters of the power supply, for example, when the power supply parameters include input current and output voltage, the first sampling circuit 301 includes a voltage sampling circuit and a current detection circuit connected to the first power circuit 101, and when the circuit to be powered or the device to be powered has overvoltage, undervoltage, overcurrent, short circuit, and the like, the controller 104 controls the power supply protection circuit 103 to execute a corresponding protection strategy.
The second sampling circuit 302 is connected to the power supply protection circuit 103, the first current detection circuit 204 and the controller 104, and is configured to sample an output voltage of the power supply protection circuit 103 and feed the output voltage back to the controller 104.
In this embodiment, the second sampling circuit 302 is a voltage sampling circuit, and includes two series resistors (not shown), the resistor dividing point is connected to the controller 104, and the controller 104 receives the output voltage of the power supply protection circuit 103 sampled by the second sampling circuit 302 and adjusts the output of the power supply protection circuit 103 according to the output voltage of the power supply protection circuit 103.
The third sampling circuit 303 is connected to the first current detection circuit 204, the power protection circuit output terminal 10, and the controller 104, and the third sampling circuit 303 is configured to sample a voltage at the power protection circuit output terminal 10.
In this embodiment, the third sampling circuit 303 is a voltage sampling circuit, and includes two series resistors (not shown), the resistor voltage dividing point is connected to the controller 104, the first feeding protection circuit 201 compares the sampling voltage (i.e. the voltage at the resistor voltage dividing point) with a first preset reference voltage, and when the sampling voltage is greater than the first preset reference voltage, the bleeding circuit 202 is started; the controller 104 receives the voltage of the output terminal 10 of the power protection circuit sampled by the third sampling circuit 303, and determines whether to turn on the second feeding protection circuit 203 according to the sampled voltage and the working state of the first feeding protection circuit 201.
It can be understood that, according to whether the sampling voltage of the third sampling circuit 303 is greater than the first preset reference voltage or the second preset reference voltage, it is further determined whether to turn on the first feeding protection circuit 201 or the second feeding protection circuit 203.
The first dc voltage circuit 304 is connected to the power supply protection circuit 103, the first current detection circuit 204, the first power supply protection circuit 201, the second power supply protection circuit 203, and the controller 104.
The first dc voltage circuit 304 steps down the voltage of the power protection circuit output terminal 10, and sends the output voltage of the first dc voltage circuit 304 to the controller 104, so that the first dc voltage circuit 304 has an output feedback function for providing a stable input voltage for the first preset reference voltage circuit 305. The first dc voltage circuit 304 is configured to provide a first dc voltage for the first feeding protection circuit 201 and the second feeding protection circuit 203, that is, to provide a power supply voltage for the comparator U1 and the first PNP transistor Q2.
The first preset reference voltage circuit 305 is connected to the first dc voltage circuit 304, the first feeding protection circuit 201 and the controller 104. The first preset reference voltage circuit 305 is a step-down circuit, and performs step-down processing on the output voltage of the first dc voltage circuit 304, so as to provide a first preset reference voltage for the first feed protection circuit 201, that is, provide a first preset reference voltage for the inverting input terminal of the comparator U1.
In summary, the positive input terminal of the comparator U1 (i.e., the first port 1 of the comparator U1) receives the sampled voltage of the third sampling circuit 303, the negative input terminal of the comparator U1 (i.e., the second port 2 of the comparator U1) receives the first predetermined reference voltage, and when the sampled voltage of the third sampling circuit 303 is greater than the first predetermined reference voltage, the output terminal of the comparator U1 (i.e., the fifth port 5 of the comparator U1) outputs a high level, and the bleeder circuit 202 is enabled. On the contrary, when the sampling voltage of the third sampling circuit 303 is less than the first preset reference voltage, the output terminal of the comparator U1 (i.e. the fifth port 5 of the comparator U1) outputs a low level, and the bleeder circuit 202 is turned off.
The voltage reduction and stabilization circuit 306 is connected to the second anti-reverse connection circuit 207, the controller 104 and the communication circuit 208, and the voltage reduction and stabilization circuit 306 reduces the output voltage of the second power circuit 102 for providing the power voltage for the controller 104 and the communication circuit 208.
As another aspect of the embodiments of the present invention, an embodiment of the present invention provides a robot arm including the power protection circuit disclosed in the above embodiments.
The robot arm cuts off the power supply of the first power supply circuit when the power supply of the first power supply circuit is abnormal, so that the hardware protection of the first power supply circuit is realized; and detecting the power supply parameters of the first power supply circuit through the controller, and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal, so that the power supply protection circuit cuts off the power supply of the first power supply circuit, thereby realizing the software protection of the first power supply circuit. Therefore, the invention can realize dual power supply and has a hardware and software dual protection mechanism, thereby improving the reliability. In addition, the controller is provided with a second power supply circuit which supplies power independently, and when the power supply of the first power supply circuit is abnormal, the software protection of the controller is not influenced, so that the reliability of the protection circuit is further improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A power protection circuit, comprising:
a first power supply circuit;
a second power supply circuit;
the power supply protection circuit is connected between the first power supply circuit and the output end of the power supply protection circuit and used for cutting off the power supply of the first power supply circuit when the power supply of the first power supply circuit is abnormal;
the controller is respectively connected with the first power supply circuit, the second power supply circuit and the power supply protection circuit and is used for detecting power supply parameters of the first power supply circuit and sending an enabling signal to the power supply protection circuit when the power supply of the first power supply circuit is abnormal so that the power supply protection circuit cuts off the power supply of the first power supply circuit;
the second power supply circuit is used for supplying power to the controller.
2. The power supply protection circuit of claim 1, further comprising a first feed protection circuit and a bleed circuit;
the first feed protection circuit is connected with the output end of the power supply protection circuit and the bleeder circuit, and is used for starting the bleeder circuit to discharge feed energy from the output end of the power supply protection circuit when the voltage of the output end of the power supply protection circuit is greater than a first preset reference voltage;
the bleeder circuit is also connected with the power protection circuit output end and is used for discharging the feed energy from the power protection circuit output end.
3. The power protection circuit according to claim 2, further comprising a second feeding protection circuit, wherein the second feeding protection circuit is connected to the controller and the bleeding circuit, the controller is connected to the output terminal of the power protection circuit, the controller is further configured to detect a voltage at the output terminal of the power protection circuit, and send a control signal to the second feeding protection circuit when the voltage at the output terminal of the power protection circuit is greater than a second preset reference voltage and the first feeding protection circuit is abnormally operated, so that the second feeding protection circuit starts the bleeding circuit to bleed feeding energy from the output terminal of the power protection circuit.
4. The power protection circuit according to claim 2 or 3, wherein the bleeder circuit comprises a first MOS transistor and a first resistor;
the grid electrode of the first MOS tube is connected with the first feed protection circuit, the drain electrode of the first MOS tube is connected with the output end of the power supply protection circuit, and the source electrode of the first MOS tube is connected with one end of the first resistor;
the other end of the first resistor is connected with the ground end.
5. The power protection circuit according to claim 2 or 3, wherein the first feeding protection circuit comprises a comparator, a first diode, a second resistor, a third resistor, and a fourth resistor;
a first port of the comparator is connected with an output end of the power protection circuit, a second port of the comparator is used for receiving the first preset reference voltage, a third port of the comparator is used for receiving a first direct-current voltage, a fourth port of the comparator is connected with a ground end, and a fifth port of the comparator is connected with an anode of the first diode and one end of the second resistor;
the cathode of the first diode is connected with one end of the fourth resistor and the bleeder circuit;
the other end of the second resistor is connected with one end of the third resistor;
the other end of the third resistor is connected with the ground end;
the other end of the fourth resistor is connected with the ground end.
6. The power protection circuit of claim 3, wherein the second feed protection circuit comprises a first PNP transistor, a first NPN transistor, and a fifth resistor;
a base electrode of the first PNP triode is connected to a collector electrode of the first NPN triode and one end of the fifth resistor, the collector electrode of the first PNP triode is connected to the bleeder circuit, an emitter electrode of the first PNP triode is connected to the other end of the fifth resistor, and the emitter electrode of the first PNP triode is used for receiving a second direct-current voltage;
the base electrode of the first NPN triode is connected with the controller, and the emitting electrode of the first NPN triode is connected with the ground end.
7. The power protection circuit according to claim 2 or 3, further comprising:
the first current detection circuit is respectively connected with the power supply protection circuit, the output end of the power supply protection circuit and the controller, and is used for detecting the output current of the output end of the power supply protection circuit and sending the output current to the controller;
the second current detection circuit is respectively connected with the first current detection circuit, the bleeder circuit and the controller, and is used for detecting the feed current flowing through the bleeder circuit and sending the feed current to the controller;
the controller is further configured to detect an output voltage at an output end of the power protection circuit, calculate real-time power consumption according to the output voltage and the output current, and cut off the first power circuit when the real-time power consumption is abnormal.
8. The power protection circuit according to claim 1, further comprising a first anti-reverse connection circuit and a second anti-reverse connection circuit;
the first reverse connection prevention circuit is connected between the first power supply circuit and the power supply protection circuit;
the second anti-reverse connection circuit is connected between the second power supply circuit and the controller.
9. The power protection circuit of claim 1, further comprising a communication circuit coupled to the controller.
10. A robot arm, characterized by comprising a power protection circuit according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597580.XA CN112186717B (en) | 2019-07-04 | 2019-07-04 | Power protection circuit and robot arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597580.XA CN112186717B (en) | 2019-07-04 | 2019-07-04 | Power protection circuit and robot arm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112186717A true CN112186717A (en) | 2021-01-05 |
| CN112186717B CN112186717B (en) | 2023-12-15 |
Family
ID=73915642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910597580.XA Active CN112186717B (en) | 2019-07-04 | 2019-07-04 | Power protection circuit and robot arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112186717B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH096441A (en) * | 1995-06-21 | 1997-01-10 | Toshiba Corp | Rush current prevention circuit |
| US20100148584A1 (en) * | 2008-12-11 | 2010-06-17 | Delta Electronics, Inc. | Uninterruptible power supply with low power loss |
| CN202888809U (en) * | 2012-09-29 | 2013-04-17 | 广东美的制冷设备有限公司 | PFC dual-protection circuit and air-conditioner |
| CN105811776A (en) * | 2016-03-16 | 2016-07-27 | 阳光电源股份有限公司 | Switching power supply circuit |
| CN207200372U (en) * | 2017-08-17 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of power-supply management system |
| US20180213618A1 (en) * | 2017-01-20 | 2018-07-26 | Fsp Technology Inc. | Power supply system and voltage output module |
| CN109066798A (en) * | 2018-09-17 | 2018-12-21 | 阳光电源股份有限公司 | A kind of cutoff device of photovoltaic module |
-
2019
- 2019-07-04 CN CN201910597580.XA patent/CN112186717B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH096441A (en) * | 1995-06-21 | 1997-01-10 | Toshiba Corp | Rush current prevention circuit |
| US20100148584A1 (en) * | 2008-12-11 | 2010-06-17 | Delta Electronics, Inc. | Uninterruptible power supply with low power loss |
| CN202888809U (en) * | 2012-09-29 | 2013-04-17 | 广东美的制冷设备有限公司 | PFC dual-protection circuit and air-conditioner |
| CN105811776A (en) * | 2016-03-16 | 2016-07-27 | 阳光电源股份有限公司 | Switching power supply circuit |
| US20180213618A1 (en) * | 2017-01-20 | 2018-07-26 | Fsp Technology Inc. | Power supply system and voltage output module |
| CN207200372U (en) * | 2017-08-17 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of power-supply management system |
| CN109066798A (en) * | 2018-09-17 | 2018-12-21 | 阳光电源股份有限公司 | A kind of cutoff device of photovoltaic module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112186717B (en) | 2023-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210391710A1 (en) | Method for starting photovoltaic rapid shutdown system, application apparatus and system | |
| CN108718152B (en) | Staggered PFC control circuit and motor driving circuit | |
| CN201414240Y (en) | Buffer current-limiting circuit for LED illuminating lamp direct-current power source | |
| US20240243577A1 (en) | Power conversion device and control method thereof | |
| CN104633861A (en) | Variable-frequency air conditioner and power supply control circuit thereof | |
| CN103050932A (en) | Electronic switch circuit for power over Ethernet | |
| CN210378896U (en) | Relay drive circuit, relay and air conditioner | |
| CN113885636B (en) | Input voltage range adjustable protection circuit | |
| CN112152186A (en) | Locked-rotor protection circuit of low-power-consumption direct-current motor | |
| CN117644784B (en) | Single-phase alternating-current charging overcurrent protection circuit and charger using same | |
| CN112186717B (en) | Power protection circuit and robot arm | |
| CN110912496A (en) | Control method and device for energy storage motor of circuit breaker | |
| CN114466481B (en) | Circuit and method for detecting no-load of LED constant-voltage driving power supply and LED driver | |
| US11843273B2 (en) | Battery module and power supply system | |
| CN114221431B (en) | Dual-power supply voltage stabilizing switching system | |
| CN112564471B (en) | Working sequence control circuit in two-stage conversion circuit and method thereof | |
| CN210839342U (en) | Voltage reduction circuit and equipment | |
| CN211786002U (en) | Detection circuit and power supply device | |
| CN104124698A (en) | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter | |
| CN109907378B (en) | Electronic cigarette power supply circuit and electronic cigarette | |
| CN208806992U (en) | A kind of intelligent electric power | |
| CN108964436B (en) | Switching power supply starting circuit | |
| CN209963948U (en) | Device for preventing auxiliary power supply of photovoltaic inverter from being started repeatedly | |
| CN211018791U (en) | Fast on/off field effect transistor control circuit | |
| CN111478287A (en) | Charging pile switching power supply fault protection circuit and charging pile power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |