CN202565213U - Novel solid-state relay for controlling operating direction of three-phase AC motor - Google Patents
Novel solid-state relay for controlling operating direction of three-phase AC motor Download PDFInfo
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- CN202565213U CN202565213U CN2012201726318U CN201220172631U CN202565213U CN 202565213 U CN202565213 U CN 202565213U CN 2012201726318 U CN2012201726318 U CN 2012201726318U CN 201220172631 U CN201220172631 U CN 201220172631U CN 202565213 U CN202565213 U CN 202565213U
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Abstract
The utility model discloses a novel solid-state relay for controlling the operating direction of a three-phase AC motor, comprising a driving module, a power component module, a phase sequence detection module, an open phase detection module and an automatic phase correction and open phase protection logic module, wherein the input end of the phase sequence detection module is connected with a three-phase power supply, and the output end is connected with the automatic phase correction and open phase protection logic module; the phase sequence detection module is used for detecting the phase sequence of the three-phase power supply and providing the phase sequence signal to the automatic phase correction and open phase protection logic module; the input end of the open phase detection module is connected with the three-phase power supply, and the output end is connected with automatic phase correction and open phase protection logic module; the open phase detection module is used for detecting the open phase when the three-phase power supply supplies power and providing the phase sequence signal to automatic phase correction and open phase protection logic module; the automatic phase correction and open phase protection logic module comprises a signal conversion unit and a signal processing unit connected to each other, wherein the signal processing unit is respectively connected with the output end of the phase sequence detection module, the output end of the open phase detection module and the driving module.
Description
Technical field
The utility model relates to solid-state relay, particularly a kind of solid-state relay to the control of three phase alternating current motor traffic direction.
Background technology
The three-phase solid-state relay plays on-off action in the application of three phase alternating current motor.Generally, two groups of (PCC) powers are arranged in the three-phase solid-state relay, be used for just/oppositely switching of three-phase alternating-current supply and three phase alternating current motor.
In use, because going wrong, the power supply of three phase alternating current motor can cause serious consequence.
The phase sequence that causes because of wiring, maintenance etc. like three phase alternating current motor changes, and motor will be worked in the other direction, influences its normal operation, sometimes even can damage motor exterior mechanical parts.
The three phase mains phase shortage that perhaps causes because of wiring, maintenance, vibration like three phase alternating current motor is with the electric current in the motor is increased severely because of phase shortage.If the motor long-term work at non-full-phase state, will make burn-down of electric motor, solid-state relay also will damage because of electric current is too high simultaneously.
What Fig. 1 represented is in prior art three-phase solid-state relay (SSR) 50, the primary structure figure that realizes with discrete component.Three-phase solid-state relay (SSR) 50 comprises driver module 51, (PCC) power module 52; Input signal CS imports dc control signal at input terminal I1 or I2, L1, L2, the last connection of L3 three-phase electricity, and U, V, W connect load LOAD.LOAD mainly is made up of motor.Its operation principle is: when I1 was effective, output U and input L1 connected, and output V and input L2 connect, and output W and input L3 connect; When I2 was effective, output U and input L1 connected, and output V and input L3 connect, and output W and input L2 connect.Make and to change the phase sequence of the three-phase electricity that is added in load end through control I1 and I2, thereby reach the purpose of control motor traffic direction.
The power device that the three-phase solid-state relay uses is a controllable silicon; The silicon controlled turn-off characteristic is more special, must load current could turn-off fully less than to a certain degree the time, so two groups of (PCC) powers of solid-state relay itself maybe be too short because of the time when switching; Under the situation that one group of (PCC) power does not also end fully; Another group (PCC) power conducting, thus the inner phase fault of three-phase solid-state relay caused, make device damage.
Present useful external equipment (phase sequence relay, controller MCU) detects three-phase electricity phase sequence and non-full-phase state, through detected power supply status, gives the solid-state relay control signal by external equipment, solves the problems referred to above.
Though the use of external equipment has solved three-phase solid-state relay some problems in three phase alternating current motor uses; But these external equipments itself are bigger with regard to volume ratio; Systematic comparison complicated (logical relation such as being processing signals needs central processing unit), price is higher; Also have problems such as compatibility, shortcoming is apparent in view.So must having a kind of structure function three-phase solid-state relay concentrated, safe and reliable and with low cost, we solve the problems referred to above.
The utility model content
In order to overcome the defective of prior art, the utility model discloses a kind of solid-state relay to the control of three phase alternating current motor traffic direction, its structure function is concentrated, safe and reliable and with low cost.
The technical scheme of the utility model is following:
A kind of novel solid-state relay to the control of three phase alternating current motor traffic direction comprises driver module, (PCC) power module, phase sequence detection module, open phase detection module, entangles and the open-phase protection logic module automatically; Said driver module is connected with the (PCC) power module; Said (PCC) power module connects three phase mains and threephase load respectively;
Wherein:
Said phase sequence detection module: input is connected with three phase mains, and its output is connected with entangling automatically with the open-phase protection logic module; Be used to detect the phase sequence of three phase mains power supply, and provide the phase sequential signal to entangling automatically and the open-phase protection logic module;
Said open phase detection module: input is connected with three phase mains, and its output is connected with entangling automatically with the open-phase protection logic module; Phase shortage whether occurs when being used for the three phase mains power supply, and provide default phase signal to entangling automatically and the open-phase protection logic module;
Said entangling automatically and the open-phase protection logic module further comprises:
Signal conversion unit: be connected with signal processing unit; Be used to receive control signal, and carry out the level conversion of control signal;
Signal processing unit: be connected with the output of phase sequence detection module, the output and the driver module of open phase detection module respectively; Be used for the signal of processing signals converting unit transmission and the signal of phase sequence detection module and open phase detection module input, and the control result after will handling outputs to driver module.
Preferably, said signal processing unit further comprises:
The open-phase protection subelement, entangle phase subelement, interlocking subelement, time-delay subelement, first input end, second input terminal, the 3rd input terminal, four-input terminal, first lead-out terminal, second lead-out terminal automatically;
First input end is connected with the output of signal conversion unit respectively with second input terminal;
The 3rd input terminal is connected with the output of open phase detection module;
Four-input terminal is connected with the output of phase sequence detection module;
First lead-out terminal is connected with the output of signal processing unit respectively with second lead-out terminal;
Wherein, first input end to the three input terminals are connected with the open-phase protection subelement respectively, and subelement links to each other four-input terminal with entangling mutually automatically, and first lead-out terminal is connected with the time-delay subelement with second lead-out terminal;
The open-phase protection subelement, entangle phase subelement, interlocking subelement automatically, the time-delay subelement connects successively; Perhaps entangle phase subelement, open-phase protection subelement, interlocking subelement automatically, the time-delay subelement connects successively;
Wherein:
The open-phase protection subelement is used for the default phase signal according to open phase detection module output, and when three-phase electricity had phase shortage, directly locking output result made the output result invalid;
Automatically entangle the phase subelement, be used for the phase sequential signal according to the output of phase sequence detection module, when the three-phase electricity phase sequence changed, the control signal that makes input was through after entangling the phase subelement automatically, and output is opposite;
The interlocking subelement is used for current primary unit and outputs to the signal of interlocking subelement when identical, and the locking of exporting the result makes the output result invalid;
The time-delay subelement is used for the control signal that outputs to driver module is delayed time, and makes control signal after the (PCC) power of (PCC) power module turn-offs, output to driver module again.
Preferably, said open-phase protection subelement further comprises:
First resistance, second resistance, first diode, second diode.
First resistance is connected with first diode anode, and the anode of first diode is connected to the first input end and the first sub-output;
Second resistance is connected with second diode anode, and the anode of second diode is connected to second input and the second sub-output;
First diode is connected with second diode cathode, is connected to the 3rd input.
Preferably, entangling the phase subelement automatically further comprises: the first XOR device, the second XOR device;
Any input of the first XOR device is connected with any input of the second XOR device, and the input of the above-mentioned first XOR device is connected to four-input terminal;
Another input of the first XOR device is connected to the first sub-output, and the output of the first XOR device is connected to the 3rd sub-output;
Another input of the second XOR device is connected to the second sub-output, and the output of the second XOR device is connected to the 4th sub-output.
Preferably, the interlocking subelement further comprises: the 3rd resistance, first electric capacity, the 3rd XOR device, the 4th XOR device, first and logical device, second and logical device;
One end of the 3rd resistance is connected to working power, and the other end is connected respectively to any input of the 3rd XOR device, any input of the 4th XOR device, the arbitrary end of first electric capacity;
The other end of first electric capacity is connected with the place of working;
Another input of the 3rd XOR device is connected respectively to the 3rd sub-output, second and any input of logical device;
The output of the 3rd XOR device is connected with any input of logical device with first;
Another input of the 4th XOR device is connected respectively to the 4th sub-output, first and another input of logical device;
The output of the 4th XOR device is connected with another input of logical device with second;
First is connected to the 5th sub-output with the output of logical device;
Second is connected to the 6th sub-output with the output of logical device.
Preferably, the time-delay subelement further comprises:
The 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, second electric capacity, the 3rd electric capacity, the 3rd diode, the 4th diode, the 3rd with logical device, the 4th and logical device;
The 3rd diode is parallelly connected with the 4th resistance, and the negative electrode of the 3rd diode is connected with the 5th sub-output, and the anode of the 3rd diode is connected with any input of logical device with any end of the 8th resistance, the 3rd respectively;
The 4th diode is parallelly connected with the 5th resistance, and the negative electrode of the 4th diode is connected with the 6th sub-output, and the anode of the 4th diode is connected with any input of logical device with any end of the 7th resistance, the 4th respectively;
The 7th resistance other end is connected with the positive pole of second electric capacity, and the negative pole of second electric capacity is connected with the place of working;
The 8th resistance other end is connected with the positive pole of the 3rd electric capacity, and the negative pole of the 3rd electric capacity is connected with the place of working;
Any end of the 6th resistance be connected respectively to the 3rd with another input of logical device, the 4th with another input of logical device, the other end of the 6th resistance is connected to working power;
The 3rd is connected to first output with the output of logical device;
The 4th is connected to second output with the output of logical device.
Preferably, said phase sequence detection module further comprises:
The 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 11 diode, the 12 diode, the 13 diode, the 14 diode, first photoelectrical coupler;
First of three phase mains connects any end of the 15 resistance, any end of the 6th electric capacity mutually respectively;
The 15 resistance other end connects any end of the 14 resistance, any end of the 18 resistance, the 11 diode anode, the 12 diode cathode respectively;
The 6th electric capacity other end connects any end of the 16 resistance;
The 16 resistance other end connects the 18 resistance other end, any end of the 17 resistance, the 13 diode anode, the 14 diode cathode respectively;
Second of the three phase mains any end of the 5th electric capacity that is connected;
The 5th electric capacity other end is connected to the 14 resistance other end;
The third phase of three phase mains connects the 17 resistance other end;
The anode of the first photoelectrical coupler input light-emitting diode connects the 11 diode cathode, the 13 diode cathode, any end of the 7th electric capacity respectively, and negative electrode connects any end of the 19 resistance;
The 19 resistance other end connects the 7th electric capacity other end, the 12 diode anode, the 14 diode anode respectively;
The collector electrode of the first photoelectric coupler output end triode connects working power, and emitter connects any end of the 20 resistance, any end of the 8th electric capacity, four-input terminal respectively;
The 20 resistance other end, the 8th electric capacity other end connect the place of working respectively.
Preferably, said open phase detection module further comprises:
The 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 4th electric capacity, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 9th diode, the tenth diode, second photoelectrical coupler, first triode, second triode;
First of the three phase mains any end of the 9th resistance that is connected; The 9th resistance other end connects the 5th diode anode, the 8th diode cathode respectively;
Second of the three phase mains any end of the tenth resistance that is connected; The tenth resistance other end connects the 6th diode anode, the 9th diode cathode respectively;
The third phase of three phase mains connects any end of the 11 resistance; The 11 resistance other end connects the 7th diode anode, the tenth diode cathode respectively;
The anode of the second photoelectrical coupler input light-emitting diode connects the 5th diode cathode, the 6th diode cathode, the 7th diode cathode respectively, and the negative electrode of said light-emitting diode connects the 8th diode anode, the 9th diode anode, the tenth diode anode respectively;
The second photoelectric coupler output end transistor collector connects working power, and the emitter of said output triode connects any end of the 12 resistance, first transistor base;
The 12 resistance other end connects the place of working;
First transistor collector connects working power, and emitter connects any end of the 4th electric capacity, any end of the 13 resistance;
The 4th electric capacity other end connects the place of working;
Second transistor base connects the 13 resistance other end, and collector electrode connects the 3rd input, and emitter connects the place of working.
Compared with prior art, the beneficial effect of the utility model is following:
The first, the solid-state relay structure function of the utility model is concentrated, itself just can realize three phase electric machine power supply entangle phase and open-phase protection automatically, needn't connect external equipment again.
The second, realize in the solid state relay of the utility model that the structure of entangling phase and open-phase protection is automatically realized by discrete component that fully promptly hardware circuit is realized.Saved the controller MCU/DSP that external equipment possibly used, provided cost savings, promptly realized identical functions with cheap price.
The 3rd, rotate and reverse two control input signals interlockings in the solid state relay of the utility model and postpone a period of time again to control logic, solved the phase fault that causes because of the controllable silicon turn-off characteristic.
The 4th; Solid-state relay is work under the environment of forceful electric power, requires device work that extremely strong antijamming capability is arranged, and the structure of the solid state relay of the utility model is owing to be through discrete component all; Be that hardware circuit is realized, so it has powerful anti-interference ability to work.
The 5th, the structure of the solid state relay of the utility model is owing to be through discrete component all, and promptly hardware circuit is realized; It is more excellent that it compares the circuit of realizing with MCU/DSP; Do not have the deadlock phenomenon, also do not exist because of the running software mistake causes device failure, perhaps bigger accident maybe.And the realization circuit of the utility model is simple, safe and reliable.
The 6th, the utility model can make three-phase alternating-current motor when the three phase mains phase shortage, can detect the generation of phase shortage in real time, and cuts off the input signal path, and (PCC) power is turn-offed, and avoids motor to burn because of phase-deficient operation.
The 7th; The utility model is monitored input three-phase electricity phase sequence in real time; When input three-phase electricity phase sequence changed, inner control logic can be sent corresponding control command and make the phase sequence that is added in motor constant, avoided changing the inconsistent phenomenon of direction that causes motor traffic direction and expectation because of phase sequence.
Description of drawings
Fig. 1 is the structural representation of prior art solid state relay;
Fig. 2 is the structural representation of the novel solid-state relay that is directed against the control of three phase alternating current motor traffic direction of the utility model specific embodiment;
Fig. 3 is the structural representation of the utility model specific embodiment signal processing unit;
Fig. 4 a is the priority circuit sketch map of the utility model specific embodiment open-phase protection subelement;
Fig. 4 b is first replacement circuit sketch map of the utility model specific embodiment open-phase protection subelement;
Fig. 4 c is second replacement circuit sketch map of the utility model specific embodiment open-phase protection subelement;
Fig. 5 a is the priority circuit sketch map that the utility model specific embodiment entangles the phase subelement automatically;
Fig. 5 b is first replacement circuit sketch map that the utility model specific embodiment entangles the phase subelement automatically;
Fig. 6 a is the priority circuit sketch map of the utility model specific embodiment interlocking subelement;
Fig. 6 b is first replacement circuit sketch map of the utility model specific embodiment interlocking subelement;
Fig. 6 c is second replacement circuit sketch map of the utility model specific embodiment interlocking subelement;
Fig. 7 is the priority circuit sketch map of the utility model specific embodiment time-delay subelement;
Fig. 8 a is the priority circuit sketch map of the utility model specific embodiment phase sequence detection module;
Fig. 8 b is first replacement circuit sketch map of the utility model specific embodiment phase sequence detection module;
Fig. 8 c is second replacement circuit sketch map of the utility model specific embodiment phase sequence detection module;
Fig. 9 a is the priority circuit sketch map of the utility model specific embodiment open phase detection module;
Fig. 9 b is first replacement circuit sketch map of the utility model specific embodiment open phase detection module;
Figure 10 carries out the flow chart of the method for three phase alternating current motor traffic direction control for the described solid-state relay of the utility model specific embodiment.
Embodiment
The below combines accompanying drawing and specific embodiment that the utility model is done further description:
Like Fig. 2; A kind of novel solid-state relay 10 to the control of three phase alternating current motor traffic direction comprises driver module 14, (PCC) power module 15, phase sequence detection module 122, open phase detection module 121, entangles and open-phase protection logic module 13, power module 11 automatically.
Directly power taking and for phase sequence detection module 122, open phase detection module 121, entangle the power supply that 5V is provided with open-phase protection logic module 13 automatically from the input signal of power module 11.Do not draw among the figure power module 11 and phase sequence detection module 122, open phase detection module 121, entangle power supply annexation with open-phase protection logic module 13 automatically.
Wherein, phase sequence detection module 122: input is connected with three phase mains 60, and its output I4 is connected with entangling automatically with open-phase protection logic module 13; Be used to detect the phase sequence of three phase mains 60 power supplies, and provide the phase sequential signal to entangling automatically and open-phase protection logic module 13.
Open phase detection module 121: input is connected with three phase mains 60, and its output I3 is connected with entangling automatically with open-phase protection logic module 13; Phase shortage whether occurs when being used to detect the three phase mains power supply, and provide default phase signal to entangling automatically and open-phase protection logic module 13.
Wherein, entangle automatically and open-phase protection logic module 13, further comprise:
Signal conversion unit 131: its output I1 is connected with the input of signal processing unit 132 respectively with I2; Be used to receive control signal CS, and carry out the level conversion of control signal; The control signal that is about to wide region is converted into the high-low level signal.Present embodiment adopts general change-over circuit to get final product here.
Signal processing unit 132: its input is connected with output I1 and the output I4 of I2, phase sequence detection module 122, the output I3 of open phase detection module 121 of signal conversion unit 131 respectively, and its output O1 is connected with the input of driver module 14 respectively with O2; Be used for the signal of processing signals converting unit 131 transmission and the signal of phase sequence detection module 122 and open phase detection module 121 transmission, and the control result after will handling outputs to driver module 14.
Phase shortage warning output unit 133: be connected with signal processing unit 132, be used for when the phase shortage situation appears in the three phase mains power supply, reporting to the police.During practical implementation, entangle automatically with open-phase protection logic module 13 in also can not comprise said phase shortage warning output unit 133.Be that it is not the core cell of this module, so the utility model is not done qualification to it here.
Like Fig. 3, signal processing unit 132 further comprises:
Open-phase protection subelement 21, entangle phase subelement 22, interlocking subelement 23, time-delay subelement 24, the sub-I10 of first input end, the second input terminal I20, the 3rd input terminal I30, the sub-I40 of four-input terminal, the first lead-out terminal O10, the second lead-out terminal O20 automatically.
The sub-I10 of first input end is connected with I2 with the output I1 of signal conversion unit 131 respectively with the second input terminal I20.
The 3rd input terminal I30 is connected with the output I3 of open phase detection module 121.
The sub-I40 of four-input terminal is connected with the output I4 of phase sequence detection module.
The first lead-out terminal O10 is connected with O2 with the output O1 of signal processing unit respectively with the second lead-out terminal O20.
Wherein, sub-I10 to the three input terminal I30 of first input end are connected with open-phase protection subelement 21 respectively, and subelement 22 links to each other the sub-I40 of four-input terminal with entangling mutually automatically, and the first lead-out terminal O10 links to each other with time-delay subelement 23 with the second lead-out terminal O20.
In the present embodiment, open-phase protection subelement 21, entangle phase subelement 22, interlocking subelement 23 automatically, time-delay subelement 24 connects successively.During practical implementation, open-phase protection subelement 21, the order of entangling phase subelement 22 automatically can be exchanged, and promptly entangle phase subelement 22, open-phase protection subelement 21, interlocking subelement 23, time-delay subelement 24 automatically and connect successively.The utility model is not made qualification to this.
Wherein:
Open-phase protection subelement 21: when three phase mains is the (PCC) power module for power supply; And occuring to a rare phase power supply connects when breaking off; This subelement can directly lock the output result according to the default phase signal of open phase detection module output, makes that to output to driver module 14 control signals invalid.
Automatically entangle phase subelement 22, when three phase mains is the (PCC) power module for power supply, and any two when exchanging link position mutually; To cause the input phase sequence of three-phase electricity to change, at this moment, entangling phase subelement 22 automatically will be according to the phase sequential signal of phase sequence detection module 121 outputs; Make the control signal of input opposite; Promptly the control signal of input is height/low level, and through entangling the low/high level that is of phase subelement 22 output automatically, it is constant finally to make three phase mains be loaded into the phase sequence of load.
Interlocking subelement 23: current primary unit outputs to the signal of interlocking subelement 23 when identical; This subelement will lock the output result; Be the interlocking subelement receive simultaneously 2 high/during low level signal, this subelement output result is full low level or overall height level.
Time-delay subelement 24: the controllable silicon in the (PCC) power module 15 turn-offs; Need load current in the controllable silicon less than certain value; This moment is if cause the inner phase fault of solid-state relay for the (PCC) power drive signal easily; Promptly under the situation that one group of (PCC) power does not also end fully; Another group (PCC) power conducting, thereby the phase fault that causes, time-delay subelement are exactly that the delay time (PCC) power of (PCC) power module 15 of the control signal that outputs to driver module 14 is outputed to driver module 14 after turn-offing again.
Like Fig. 4 a, open-phase protection subelement 21 further comprises:
First resistance R 1, second resistance R 2, the first diode D1, the second diode D2.
First resistance R 1 is connected with the first diode D1 anode, and the anode of the first diode D1 is connected to the first input end I10 and the first sub-output O311.
Second resistance R 2 is connected with the second diode D2 anode, and the anode of the second diode D2 is connected to the second input I20 and the second sub-output O312.
The first diode D1 is connected with the second diode D2 negative electrode, is connected to the 3rd input I30.
Foregoing circuit only is the preferred embodiment of open-phase protection subelement, during practical implementation, also has a lot of alternatives, forms with logical device by two like Fig. 4 b; Fig. 4 c is made up of two or logical device, and this circuit is used for when default phase signal is represented phase shortage with high level, makes 2 control signals of open-phase protection subelement 21 outputs identical.The utility model is not made qualification to the physical circuit form.
Like Fig. 5 a, entangle phase subelement 22 automatically and further comprise: the first XOR device IC11, the second XOR device IC12.
Any input of the first XOR device IC11 is connected with any input of the second XOR device IC12, and the input of the above-mentioned first XOR device IC11 is connected to four-input terminal I40.
Another input of the first XOR device IC11 is connected to the first sub-output O311, and the output of the first XOR device IC11 is connected to the 3rd sub-output O313.
Another input of the second XOR device IC12 is connected to the second sub-output O312, and the output of the second XOR device IC12 is connected to the 4th sub-output O314.
Foregoing circuit only is the preferred embodiment of entangling the phase subelement automatically, during practical implementation, also has a lot of alternatives, as Fig. 5 b by two with or logical device forms, when the phase sequence signal change, entangle the signal that phase subelement 22 exports automatically and will change.The utility model is not made qualification to the physical circuit form.
Like Fig. 6 a, interlocking subelement 23 further comprises: the 3rd resistance R 3, first capacitor C 1, the 3rd XOR device IC13, the 4th XOR device IC14, first and logical device IC21, second and logical device IC22.
One end of the 3rd resistance R 3 is connected to working power, and the other end is connected respectively to any input of the 3rd XOR device IC13, any input of the 4th XOR device IC14, the arbitrary end of first capacitor C 1; The other end of first capacitor C 1 is connected with the place of working.
Another input of the 3rd XOR device IC13 is connected respectively to the 3rd sub-output O313, second and any input of logical device IC22.
The output of the 3rd XOR device IC13 is connected with any input of logical device IC21 with first.
Another input of the 4th XOR device IC14 is connected respectively to the 4th sub-output O314, first and another input of logical device IC21.
The output of the 4th XOR device IC14 is connected with another input of logical device IC22 with second.
First is connected to the 5th sub-output O315 with the output of logical device IC21;
Second is connected to the 6th sub-output O316 with the output of logical device IC22.
Foregoing circuit only is the preferred embodiment of interlocking subelement, during practical implementation, also has a lot of alternatives, as Fig. 6 b by two with or logical device, two NAND Logic devices, a resistance, an electric capacity form; Fig. 6 c is by two reverse logic devices, two and logical device, and when two identical signals inputs, through the signals reverse of reverse logic device, the signal that is input to this moment with logical device is 2 various signals, is output as full low level this moment; When two various signals are input to the interlocking subelement; Signals reverse through the reverse logic device; Be input to one of them and the signal overall height level of logical device this moment, is input to another and the full low level of signal of logical device, is a high level from two signals of exporting with logical device at this moment; A low level guarantees that with this control signal that outputs to driver module from the interlocking subelement can be simultaneously effectively.The utility model is not made qualification to the physical circuit form.
Like Fig. 7, time-delay subelement 23 further comprises:
The 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, second capacitor C 2, the 3rd capacitor C 3, the 3rd diode D3, the 4th diode D4, the 3rd with logical device IC23, the 4th with logical device IC24.
The 3rd diode D3 is parallelly connected with the 4th resistance R 4, and the negative electrode of the 3rd diode D3 is connected with the 5th sub-output O315, and the anode of the 3rd diode D3 is connected with any input of logical device IC23 with the 8th resistance R 8 any ends, the 3rd respectively.
The 4th diode D4 is parallelly connected with the 5th resistance R 5, and the negative electrode of the 4th diode D4 is connected with the 6th sub-output O316, and the anode of the 4th diode D4 is connected with any input of logical device IC24 with the 7th resistance R 7 any ends, the 4th respectively.
The 7th resistance R 7 other ends are connected with the positive pole of second capacitor C 2, and the negative pole of second capacitor C 2 is connected with the place of working.
The 8th resistance R 8 other ends are connected with the positive pole of the 3rd capacitor C 3, and the negative pole of the 3rd capacitor C 3 is connected with the place of working.
Any end of the 6th resistance R 6 be connected respectively to the 3rd with another input of logical device IC23, the 4th with another input of logical device IC24, the other end of the 6th resistance R 6 is connected to working power.
The 3rd is connected to the first output O10 with the output of logical device IC23.
The 4th is connected to the second output O20 with the output of logical device IC24.
Like Fig. 8, phase sequence detection module 122 further comprises:
The 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R 20, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C the 8, the 11 diode D11, the 12 diode D12, the 13 diode D13, the 14 diode D14, the first photoelectrical coupler IC31.
The first phase L1 of three phase mains connects the 15 resistance R 15 any ends, the 6th capacitor C 6 any ends respectively.
The 15 resistance R 15 other ends connect the 14 resistance R 14 any ends, the 18 resistance R 18 any ends, the 11 diode D11 anode, the 12 diode D12 negative electrode respectively.
The 6th capacitor C 6 other ends connect the 16 resistance R 16 any ends.
The 16 resistance R 16 other ends connect the 18 resistance R 18 other ends, the 17 resistance R 17 any ends, the 13 diode D13 anode, the 14 diode D14 negative electrode respectively.
The second phase L2 of three phase mains connects the 5th capacitor C 5 any ends.
The 5th capacitor C 5 other ends are connected to the 14 resistance R 14 other ends.
The third phase L3 of three phase mains connects the 17 resistance R 17 other ends.
The anode of the first photoelectrical coupler IC31 input light-emitting diode connects the 11 diode D11 negative electrode, the 13 diode D13 negative electrode, the 7th capacitor C 7 any ends respectively, and negative electrode connects the 19 resistance R 19 any ends.
The 19 resistance R 19 other ends connect the 7th capacitor C 7 other ends, the 12 diode D12 anode, the 14 diode D14 anode respectively;
The collector electrode of the first photoelectrical coupler IC31 output triode connects working power, and emitter connects the 20 resistance R 20 any ends, the 8th capacitor C 8 any ends, four-input terminal I40 respectively.
The 20 resistance R 20 other ends, the 8th capacitor C 8 other ends connect the place of working respectively.
Foregoing circuit only is the preferred embodiment of phase sequence detection module, during practical implementation, also has a lot of alternatives, is made up of nine resistance, three diodes, three photoelectrical couplers, four NAND Logic devices, two triodes, an electric capacity like Fig. 8 b.The input of three photoelectrical couplers and diode are formed a three-phase commutation bridge; Limit the electric current in the rectifier bridge with three resistance, at this moment, three photoelectrical couplers will be exported six groups of signals; These six groups of signals are through four NAND Logic device outputs and the synperiodic duty cycle signals of three-phase electricity; Or be high level 100% duty cycle signals, high level signal ends the PNP triode, finally exports the phase sequence state of high level signal as this moment; Or be high level 5/6 duty cycle signals; This signal makes the PNP triode have 1/6 cycle to be in the electric capacity charging that conducting state is given the back; And making the conducting of NPN triode, other 5/6 cycle keeps the conducting of NPN triode by capacitor discharge, finally exports the phase sequence state of a low level as this moment; This circuit of Fig. 8 c changes the circuit of photoelectric coupled device output on the basis of Fig. 8 a, export the phase sequence signal indication different phase sequence states opposite with Fig. 8 a.The utility model is not made qualification to the physical circuit form.
Like Fig. 9 a, open phase detection module 121 further comprises:
The 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R the 12, the 13 resistance R 13, the 4th capacitor C 4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, the tenth diode D10, the second photoelectrical coupler IC32, the first triode Q1, the second triode Q2.
The first phase L1 of three phase mains connects the 9th resistance R 9 any ends; The 9th resistance R 9 other ends connect the 5th diode D5 anode, the 8th diode D8 negative electrode respectively;
The second phase L2 of three phase mains connects the tenth resistance R 10 any ends; The tenth resistance R 10 other ends connect the 6th diode D6 anode, the 9th diode D9 negative electrode respectively;
The third phase L3 of three phase mains connects the 11 resistance R 11 any ends; The 11 resistance R 11 other ends connect the 7th diode D7 anode, the tenth diode D10 negative electrode respectively;
The anode of the second photoelectrical coupler IC32 input light-emitting diode connects the 5th diode D5 negative electrode, the 6th diode D6 negative electrode, the 7th diode D7 negative electrode respectively, and the negative electrode of said light-emitting diode connects the 8th diode D8 anode, the 9th diode D9 anode, the tenth diode D10 anode respectively;
The second photoelectrical coupler IC32 output transistor collector connects working power, and the emitter of said output triode connects the 12 resistance R 12 any ends, the first triode Q1 base stage.The 12 resistance R 12 other ends connect the place of working respectively;
The first triode Q1 collector electrode connects working power, and emitter connects the 4th capacitor C 4 any ends, the 13 resistance R 13 any ends; The 4th capacitor C 4 other ends connect the place of working.
The second triode Q2 base stage connects the 13 resistance R 13 other ends, and its collector electrode connects the 3rd input I30, and emitter connects the place of working.
Foregoing circuit only is the preferred embodiment of open phase detection module; During practical implementation; Also have a lot of alternatives, on the basis of lack detection circuit Fig. 9 a, increase a reverse logic device at the output of default phase signal like this schematic diagram of Fig. 9 b; The opposite default phase signal of exporting among use and Fig. 9 a is represented non-full-phase state at this moment.The utility model is not made qualification to the physical circuit form.
Like Figure 10, in conjunction with the structure of above-mentioned solid-state relay, further describe the method for using above-mentioned solid-state relay to carry out the control of three phase alternating current motor traffic direction, comprise the following steps:
S1: three phase mains inserts phase sequence detection module 122, and phase sequence detection module 122 detects the phase sequence of three phase mains power supply, and provides the phase sequential signal to the signal processing unit 132 that entangles automatically with open-phase protection logic module 13.
S2: three phase mains inserts open phase detection module 121, and open phase detection module 121 detects the three phase mains power supply and whether has phase shortage, and provides default phase signal to the signal processing unit that entangles automatically with open-phase protection logic module 13.
S3: control signal CS input signal converting unit 131, after handling, 131 pairs of these control signals of signal conversion unit CS exports to signal processing unit 132.
S4: the signal of signal processing unit 132 processing signals converting units 131 transmission and the signal of phase sequence detection module 122 and open phase detection module 121 inputs, and the control result after will handling outputs to driver module 14.
S5: driver module 14 is through the phase sequence of power controlling assembly module 15 control three phase electric machines.
Among Figure 10, step S1 to S5 connects in order, but in the specific implementation, above-mentioned steps S1, S2, S3 be the order of priority not, and the three can carry out simultaneously, also can different orders successively carry out.The present invention does not limit the order of step S1, S2, S3.
Wherein, step S1 further comprises:
Setting height/low level is three phase mains forward phase sequence, and low/high level is the reverse phase sequence of three phase mains, and this moment, the phase sequence detection module can be given signal processing unit according to the height/low level signal of the correspondence of three-phase power supply phase sequence state output of current input
Step S2 further comprises:
Setting height/low level is three phase mains power supply phase shortage, and low/high level is the three phase mains not phase shortage of supplying power, and this moment, open phase detection module can be given signal processing unit according to the height/low level signal of the correspondence of three phase mains non-full-phase state output of current input
Step S4 further comprises:
S41: the signal of signal conversion unit 131 and default phase signal are input in the open-phase protection subelement 21.When three phase mains is the (PCC) power module for power supply; And occuring to a rare phase power supply connects when breaking off; This subelement can directly lock the output result according to the default phase signal of open phase detection module 121 output, even it is invalid to output to the control signal of driver module 14.
S42: the output signal of open-phase protection subelement 21 and the input of phase sequential signal are entangled in the phase subelement 22 automatically.When three phase mains is the (PCC) power module for power supply, and any two when exchanging link position mutually, will cause the input phase sequence of three-phase electricity to change; At this moment; Automatically entangling phase subelement 22 will make the control signal output of input opposite according to the phase sequential signal of phase sequence detecting unit 122 outputs, and promptly the control signal of input is height/low level; Through entangling the low/high level that is of phase subelement output automatically, it is constant finally to make three phase mains be loaded into the phase sequence of load.
S43: that entangles phase subelement 22 automatically outputs signal to interlocking subelement 23, when interlocking subelement 23 receives a pair of (two) identical signal, and low level that this subelement will be exported a pair of (two).
S44: the output signal of interlocking subelement 23 is transferred to time-delay subelement 24, and controllable silicon in the (PCC) power module 15 turn-offs, and needs load current in the controllable silicon less than certain value.This moment is if cause the inner phase fault of solid-state relay for the (PCC) power drive signal easily, and the control signal that time-delay subelement 24 will the output to drive circuit exactly (PCC) power of delaying time outputs to drive circuit after turn-offing again.
In the above-mentioned steps.Among the step S2, open-phase protection subelement 21, the order of entangling phase subelement 22 automatically can be exchanged.The utility model is not made qualification to the order of above-mentioned steps.
Compared with prior art, the beneficial effect of the utility model is following:
The first, the solid-state relay structure function of the utility model is concentrated, itself just can realize three phase electric machine power supply entangle phase and open-phase protection automatically, needn't connect external equipment again.
The second, realize in the solid state relay of the utility model that the structure of entangling phase and open-phase protection is automatically realized by discrete component that fully promptly hardware circuit is realized.Saved the controller MCU/DSP that external equipment possibly used, provided cost savings, promptly realized identical functions with cheap price.
The 3rd, rotate and reverse two control input signals interlockings in the solid state relay of the utility model and postpone a period of time again to control logic, solved the phase fault that causes because of the controllable silicon turn-off characteristic.
The 4th; Solid-state relay is work under the environment of forceful electric power, requires device work that extremely strong antijamming capability is arranged, and the structure of the solid state relay of the utility model is owing to be through discrete component all; Be that hardware circuit is realized, so it has powerful anti-interference ability to work.
The 5th, the structure of the solid-state relay of the utility model is owing to be through discrete component all, and promptly hardware circuit is realized; It is more excellent that it compares the circuit of realizing with MCU/DSP; Do not have the deadlock phenomenon, also do not exist because of the running software mistake causes device failure, perhaps bigger accident maybe.And the realization circuit of the utility model is simple, safe and reliable.
The 6th, the utility model can detect the generation of phase shortage in real time, makes three-phase alternating-current motor when the three phase mains phase shortage, makes the control signal input invalid, and the switch-off power assembly avoids motor to damage because of phase-deficient operation.
The 7th; The utility model is monitored three-phase electricity input phase sequence in real time; When three-phase electricity input phase sequence changed, inner control logic can be sent corresponding control command and make the phase sequence that is added in motor constant, avoided changing the inconsistent phenomenon of direction that causes motor traffic direction and expectation because of phase sequence.
The utility model preferred embodiment just is used for helping to set forth the utility model.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this utility model yet and is merely described embodiment.Obviously, according to the content of this specification, can do a lot of modifications and variation.These embodiment are chosen and specifically described to this specification, is principle and practical application in order to explain the utility model better, thereby person skilled can be utilized the utility model well under making.The utility model only receives the restriction of claims and four corner and equivalent.
Claims (8)
1. the novel solid-state relay to the control of three phase alternating current motor traffic direction comprises driver module, (PCC) power module, and said driver module is connected with the (PCC) power module; Said (PCC) power module connects three phase mains and threephase load respectively; It is characterized in that: also comprise phase sequence detection module, open phase detection module, entangle and the open-phase protection logic module automatically;
Wherein:
Said phase sequence detection module: input is connected with three phase mains, and its output is connected with entangling automatically with the open-phase protection logic module; Be used to detect the phase sequence of three phase mains power supply, and provide the phase sequential signal to entangling automatically and the open-phase protection logic module;
Said open phase detection module: input is connected with three phase mains, and its output is connected with entangling automatically with the open-phase protection logic module; Phase shortage whether occurs when being used for the three phase mains power supply, and provide default phase signal to entangling automatically and the open-phase protection logic module;
Said entangling automatically and the open-phase protection logic module further comprises:
Signal conversion unit: be connected with signal processing unit; Be used to receive control signal, and carry out the level conversion of control signal;
Signal processing unit: be connected with the output of phase sequence detection module, the output and the driver module of open phase detection module respectively; Be used for the signal of processing signals converting unit transmission and the signal of phase sequence detection module and open phase detection module input, and the control result after will handling outputs to driver module.
2. solid-state relay according to claim 1 is characterized in that, said signal processing unit further comprises:
The open-phase protection subelement, entangle phase subelement, interlocking subelement, time-delay subelement, first input end, second input terminal, the 3rd input terminal, four-input terminal, first lead-out terminal, second lead-out terminal automatically;
First input end is connected with the output of signal conversion unit respectively with second input terminal;
The 3rd input terminal is connected with the output of open phase detection module;
Four-input terminal is connected with the output of phase sequence detection module;
First lead-out terminal is connected with the output of signal processing unit respectively with second lead-out terminal;
Wherein, first input end to the three input terminals are connected with the open-phase protection subelement respectively, and subelement links to each other four-input terminal with entangling mutually automatically, and first lead-out terminal is connected with the time-delay subelement with second lead-out terminal;
The open-phase protection subelement, entangle phase subelement, interlocking subelement automatically, the time-delay subelement connects successively; Perhaps entangle phase subelement, open-phase protection subelement, interlocking subelement automatically, the time-delay subelement connects successively;
Wherein:
The open-phase protection subelement is used for the default phase signal according to open phase detection module output, and when three-phase electricity had phase shortage, directly locking output result made the output result invalid;
Automatically entangle the phase subelement, be used for the phase sequential signal according to the output of phase sequence detection module, when the three-phase electricity phase sequence changed, the control signal that makes input was through after entangling the phase subelement automatically, and output is opposite;
The interlocking subelement is used for current primary unit and outputs to the signal of interlocking subelement when identical, and the locking of exporting the result makes the output result invalid;
The time-delay subelement is used for the control signal that outputs to driver module is delayed time, and makes control signal after the (PCC) power of (PCC) power module turn-offs, output to driver module again.
3. solid-state relay according to claim 2 is characterized in that, said open-phase protection subelement further comprises:
First resistance, second resistance, first diode, second diode;
First resistance is connected with first diode anode, and the anode of first diode is connected to the first input end and the first sub-output;
Second resistance is connected with second diode anode, and the anode of second diode is connected to second input and the second sub-output;
First diode is connected with second diode cathode, is connected to the 3rd input.
4. solid-state relay according to claim 3 is characterized in that, entangles the phase subelement automatically and further comprises: the first XOR device, the second XOR device;
Any input of the first XOR device is connected with any input of the second XOR device, and the input of the above-mentioned first XOR device is connected to four-input terminal;
Another input of the first XOR device is connected to the first sub-output, and the output of the first XOR device is connected to the 3rd sub-output;
Another input of the second XOR device is connected to the second sub-output, and the output of the second XOR device is connected to the 4th sub-output.
5. solid-state relay according to claim 4 is characterized in that, the interlocking subelement further comprises: the 3rd resistance, first electric capacity, the 3rd XOR device, the 4th XOR device, first and logical device, second and logical device;
One end of the 3rd resistance is connected to working power, and the other end is connected respectively to any input of the 3rd XOR device, any input of the 4th XOR device, the arbitrary end of first electric capacity;
The other end of first electric capacity is connected with the place of working;
Another input of the 3rd XOR device is connected respectively to the 3rd sub-output, second and any input of logical device;
The output of the 3rd XOR device is connected with any input of logical device with first;
Another input of the 4th XOR device is connected respectively to the 4th sub-output, first and another input of logical device;
The output of the 4th XOR device is connected with another input of logical device with second;
First is connected to the 5th sub-output with the output of logical device;
Second is connected to the 6th sub-output with the output of logical device.
6. solid-state relay according to claim 5 is characterized in that, the time-delay subelement further comprises:
The 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, second electric capacity, the 3rd electric capacity, the 3rd diode, the 4th diode, the 3rd with logical device, the 4th and logical device;
The 3rd diode is parallelly connected with the 4th resistance, and the negative electrode of the 3rd diode is connected with the 5th sub-output, and the anode of the 3rd diode is connected with any input of logical device with any end of the 8th resistance, the 3rd respectively;
The 4th diode is parallelly connected with the 5th resistance, and the negative electrode of the 4th diode is connected with the 6th sub-output, and the anode of the 4th diode is connected with any input of logical device with any end of the 7th resistance, the 4th respectively;
The 7th resistance other end is connected with the positive pole of second electric capacity, and the negative pole of second electric capacity is connected with the place of working;
The 8th resistance other end is connected with the positive pole of the 3rd electric capacity, and the negative pole of the 3rd electric capacity is connected with the place of working;
Any end of the 6th resistance be connected respectively to the 3rd with another input of logical device, the 4th with another input of logical device, the other end of the 6th resistance is connected to working power;
The 3rd is connected to first output with the output of logical device;
The 4th is connected to second output with the output of logical device.
7. solid-state relay according to claim 1 is characterized in that, said phase sequence detection module further comprises:
The 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 11 diode, the 12 diode, the 13 diode, the 14 diode, first photoelectrical coupler;
First of three phase mains connects any end of the 15 resistance, any end of the 6th electric capacity mutually respectively;
The 15 resistance other end connects any end of the 14 resistance, any end of the 18 resistance, the 11 diode anode, the 12 diode cathode respectively;
The 6th electric capacity other end connects any end of the 16 resistance;
The 16 resistance other end connects the 18 resistance other end, any end of the 17 resistance, the 13 diode anode, the 14 diode cathode respectively;
Second of the three phase mains any end of the 5th electric capacity that is connected;
The 5th electric capacity other end is connected to the 14 resistance other end;
The third phase of three phase mains connects the 17 resistance other end;
The anode of the first photoelectrical coupler input light-emitting diode connects the 11 diode cathode, the 13 diode cathode, any end of the 7th electric capacity respectively, and negative electrode connects any end of the 19 resistance;
The 19 resistance other end connects the 7th electric capacity other end, the 12 diode anode, the 14 diode anode respectively;
The collector electrode of the first photoelectric coupler output end triode connects working power, and emitter connects any end of the 20 resistance, any end of the 8th electric capacity, four-input terminal respectively;
The 20 resistance other end, the 8th electric capacity other end connect the place of working respectively.
8. solid-state relay according to claim 1 is characterized in that, said open phase detection module further comprises:
The 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 4th electric capacity, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 9th diode, the tenth diode, second photoelectrical coupler, first triode, second triode;
First of the three phase mains any end of the 9th resistance that is connected; The 9th resistance other end connects the 5th diode anode, the 8th diode cathode respectively;
Second of the three phase mains any end of the tenth resistance that is connected; The tenth resistance other end connects the 6th diode anode, the 9th diode cathode respectively;
The third phase of three phase mains connects any end of the 11 resistance; The 11 resistance other end connects the 7th diode anode, the tenth diode cathode respectively;
The anode of the second photoelectrical coupler input light-emitting diode connects the 5th diode cathode, the 6th diode cathode, the 7th diode cathode respectively, and the negative electrode of said light-emitting diode connects the 8th diode anode, the 9th diode anode, the tenth diode anode respectively;
The second photoelectric coupler output end transistor collector connects working power, and the emitter of said output triode connects any end of the 12 resistance, first transistor base;
The 12 resistance other end connects the place of working;
First transistor collector connects working power, and emitter connects any end of the 4th electric capacity, any end of the 13 resistance;
The 4th electric capacity other end connects the place of working;
Second transistor base connects the 13 resistance other end, and collector electrode connects the 3rd input, and emitter connects the place of working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201726318U CN202565213U (en) | 2012-04-23 | 2012-04-23 | Novel solid-state relay for controlling operating direction of three-phase AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201726318U CN202565213U (en) | 2012-04-23 | 2012-04-23 | Novel solid-state relay for controlling operating direction of three-phase AC motor |
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| Publication Number | Publication Date |
|---|---|
| CN202565213U true CN202565213U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201726318U Withdrawn - After Issue CN202565213U (en) | 2012-04-23 | 2012-04-23 | Novel solid-state relay for controlling operating direction of three-phase AC motor |
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| Country | Link |
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| CN (1) | CN202565213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664568A (en) * | 2012-04-23 | 2012-09-12 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
-
2012
- 2012-04-23 CN CN2012201726318U patent/CN202565213U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664568A (en) * | 2012-04-23 | 2012-09-12 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
| WO2013159557A1 (en) * | 2012-04-23 | 2013-10-31 | 库顿电子科技(上海)有限公司 | Novel solid-state relay for running direction control of three-phase alternating current motor and method thereof |
| CN102664568B (en) * | 2012-04-23 | 2014-12-24 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
| US9559625B2 (en) | 2012-04-23 | 2017-01-31 | Kudom Electronics Technology (Shanghai) Co., Ltd. | Solid-state relay for running direction control of three-phase alternating current motor and method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121128 Effective date of abandoning: 20141224 |
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| RGAV | Abandon patent right to avoid regrant |