CN110311460A - Method of supplying power to, device, encoder and the servo-system of encoder - Google Patents

Method of supplying power to, device, encoder and the servo-system of encoder Download PDF

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Publication number
CN110311460A
CN110311460A CN201910718265.8A CN201910718265A CN110311460A CN 110311460 A CN110311460 A CN 110311460A CN 201910718265 A CN201910718265 A CN 201910718265A CN 110311460 A CN110311460 A CN 110311460A
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CN
China
Prior art keywords
encoder
capacitor
electricity
power supply
energy
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.)
Pending
Application number
CN201910718265.8A
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Chinese (zh)
Inventor
王思月
彭玉礼
周溪
王广
任华栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201910718265.8A priority Critical patent/CN110311460A/en
Publication of CN110311460A publication Critical patent/CN110311460A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21Devices for sensing speed or position, or actuated thereby
    • H02K11/22Optical devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The application proposes method of supplying power to, device, encoder and the servo-system of a kind of encoder, and wherein device includes: energy-storage units, the electric energy for being generated when recycling motor braking reduction of speed when motor is in braking low speed state;Power supply unit, for using the electric energy in energy-storage units as encoder power supply.By the electric energy that generates when recycling motor braking reduction of speed it is that encoder is powered, to realize the recycling of electric energy, while the step of encoder is without installing dry cell as backup power source, complicated replacement battery being avoided while improving capacity usage ratio.

Description

Method of supplying power to, device, encoder and the servo-system of encoder
Technical field
This application involves motor fields, the in particular to method of supplying power to of encoder, device, encoder and servo-system.
Background technique
Photoelectric encoder be it is a kind of integrate optics, machinery, angle-measuring equipment electrically, at mechanical structure and signal Reason circuit convert optical signals into electric signal, thus realize the direct of a variety of physical quantitys such as diagonal displacement, speed and position or Measurement indirectly.
In servo-system, when servo-driver power-off, need to supply photoelectric encoder by battery Electricity is to record multi-turn, when motor emergency stop, a large amount of energy can be generated in the short time, in order to protect circuit, using braking Resistance discharges, but the energy that braking resistor generates is not utilized effectively, and causes the waste of the energy.
Summary of the invention
This application provides a kind of method of supplying power to of encoder, device, encoder and servo-systems, for substituting braking electricity Resistance reduces energy loss, improves capacity usage ratio.
To solve the above-mentioned problems, as the one aspect of the application, a kind of power supply unit of encoder is provided, is encoded Device is connected to motor, comprising:
Energy-storage units, the electric energy for being generated when recycling motor braking reduction of speed when motor is in braking low speed state;
Power supply unit, for using the electric energy in energy-storage units as encoder power supply.
Optionally, further includes: control unit;
Energy-storage units, including battery and capacitor;
Control unit is used for the electricity in sensing capacitor when the electricity of capacitor is lower than the first default electricity The electric energy of capacitor storage recycling;When the electricity of capacitor is not less than the first default electricity, using accumulators store recycling Electric energy.
Optionally, power supply unit is logical when for detecting that the electricity of capacitor is higher than the second default electricity in control unit Capacitor is crossed as encoder power supply, when control unit detects the electricity of capacitor not higher than the second default electricity, passes through storage Battery is encoder power supply.
Optionally, energy-storage units further include: discharge load;
When capacitor is that encoder is powered, battery carries out pre-arcing by discharge load.
Optionally, encoder has main power source, for powering for encoder;
Power supply unit is used in main power source power-off, is encoder power supply with the electric energy in energy-storage units.
The application also proposes a kind of encoder, any power supply unit proposed including the application.
The application also proposes a kind of servo-system, including servo-driver, servo motor, encoder and power supply unit, supplies Denso is set to any power supply unit that application proposes;
Alternatively, including servo-driver, servo motor and encoder, the encoder is any volume that the application proposes Code device.
The application also proposes that a kind of method of supplying power to of encoder, encoder are connected to motor, comprising:
The electric energy that generates and energy-storage units are stored in when motor is in braking low speed state, when recycling motor braking reduction of speed In;
It the use of the electric energy in energy-storage units is encoder power supply.
Optionally, energy-storage units include battery and capacitor;
Method of supplying power to further include:
Electricity in sensing capacitor is stored back into when the electricity of capacitor is lower than the first default electricity using capacitor The electric energy of receipts;When the electricity of capacitor is not less than the first default electricity, using the electric energy of accumulators store recycling.
It optionally, the use of the electric energy in energy-storage units is encoder power supply, comprising:
Passing through the capacitor when the electricity of capacitor is higher than the second default electricity is encoder power supply, in capacitor It is encoder power supply by the battery when electricity of device is not higher than the second default electricity.
Optionally, further includes:
When capacitor is that encoder is powered, battery carries out pre-arcing by discharge load.
Optionally, encoder has for the main power source for encoder power supply;
It is encoder power supply with the electric energy in energy-storage units in main power source power-off.
Present applicant proposes a kind of method of supplying power to of encoder, device, encoder and servo-systems, for substituting existing skill Braking resistor in art is encoder power supply by the electric energy generated when recycling motor braking reduction of speed, to realize electric energy Recycling, while encoder avoids while improving capacity usage ratio without dry cell is installed as backup power source The step of complicated replacement battery.
Detailed description of the invention
Fig. 1 is a kind of braking system of motor in the prior art;
Fig. 2 is a kind of structural schematic diagram of the power supply unit of encoder in the embodiment of the present application;
Fig. 3 is the structural schematic diagram of the power supply unit of another encoder in the embodiment of the present application;
Fig. 4 is a kind of flow chart of the method for supplying power to of encoder in the embodiment of the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein can in addition to illustrating herein or Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover Covering non-exclusive includes to be not necessarily limited to for example, containing the process, method of a series of steps or units, device, product or device Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product Or other step or units that device is intrinsic.
In the prior art, referring to FIG. 1, in servo-system, power supply is motor by rectification circuit and inverter circuit Power supply is usually determined frequency and is realized when motor braking reduction of speed by gradually reducing, when motor inertia is larger, motor The lower general who has surrendered of revolving speed do not catch up with the decline of motor synchronous rotational speed, i.e. the actual speed of motor is greater than its synchronous rotational speed, electric at this time On the contrary, the induced electromotive force of rotor windings when the direction of the magnetic induction line of machine rotor winding cutting rotating excitation field and motor constant-speed operation With sense of current on the contrary, generated electromagnetic torque also just and motor direction of rotation on the contrary, negative torque will occur in motor, at this time Motor be actually generator, cause the voltage of DC circuit in frequency converter to increase, at this time generally by triode conduct open It closes (upper right side does not mark in Fig. 1), when detecting the raised certain numerical value of voltage, controls the circuit communication of braking resistor, it will The electric energy generated when braking reduction of speed is consumed in the form of thermal energy in braking resistor.
However the energy generated when braking reduction of speed can not be utilized effectively, on the other hand, in the electricity of servo-system Often configuration code device on machine, records the position of motor, equipped with battery to be recorded when driver powers off in encoder Prevent position from losing.Present inventor is through thinking deeply, it is contemplated that rechargeable battery can be used as by the battery in encoder, together When with the energy that generates when braking reduction of speed be that battery in encoder charges, replacement electricity is reduced on the basis of preventing energy dissipation Pond and the number to charge for battery.
Referring to FIG. 2, the encoder is connected to motor present applicant proposes a kind of power supply unit of encoder, it is used for The position of motor is measured, encoder can be photoelectric encoder and be also possible to magnetic encoder, power supply unit, comprising:
Energy-storage units 10, the electric energy for being generated when recycling motor braking reduction of speed when motor is in braking low speed state; Power supply unit 20 is powered for using the electric energy in the energy-storage units for the encoder.
In the application, the electric energy generated when recycling storage motor braking reduction of speed using energy-storage units 10 specifically be can be logical The voltage on the DC circuit of detection motor inverter is crossed, because motor as generator will lead to frequency conversion when motor braking reduction of speed DC circuit voltage increases in device, so controlling energy-storage units and motor DC circuit communication when voltage reaches threshold value and filling Electricity, thus the electric energy generated when storage motor braking reduction of speed while reducing the voltage in frequency converter on DC circuit, then It is powered using the encoder that the electric energy is motor.Using motor as servo motor, encoder is photoelectric encoder example, servo-driver Servo motor and photoelectric encoder are controlled, when servo-driver issues control signal electric machine emergency stop, the main confession of photoelectric encoder Electricity (utilizing mains-supplied), which synchronizes, to be disconnected, because motor can't stop at once, photoelectric encoder cannot be immediately at this time It stops working, otherwise can lose the position of motor, therefore the energy-storage units 10 in the application are at this time as the electricity of photoelectric encoder Source powers for it, because the energy generated when motor braking records the energy of motor position much larger than photoelectric encoder, i.e., So that 10 script of energy-storage units is not had energy storage, can also guarantee the normal work of photoelectric encoder to discharge when recycling electric energy.
The power supply unit that the application proposes is for substituting braking resistor in the prior art, by recycling motor braking reduction of speed When the electric energy that generates be encoder power supply, to realize the recycling of electric energy, while encoder is without installation dry cell As backup power source, the step of complicated replacement battery is avoided while improving capacity usage ratio.
In some alternative embodiments, as shown in figure 3, the control device that the application proposes further include: control unit 30;
The energy-storage units 10, including battery and capacitor;
Described control unit 30 is used to detect the electricity in the capacitor, when the electricity of the capacitor is pre- lower than first If when electricity, using the electric energy of capacitor storage recycling;When the electricity of the capacitor is not less than the first default electricity, The electric energy recycled using the accumulators store.
Specifically, control unit 30 can judge the electricity of capacitor, storage by the voltage at sensing capacitor both ends Hilted broadsword double-gate switch can be set at the charge port of unit 10, hilted broadsword double-gate is switched for controlling capacitor or battery and change DC circuit connects in frequency device, and the electric energy generated when to recycling motor braking reduction of speed, control unit 30 has detected capacitor Electricity simultaneously controls hilted broadsword double-gate switch, to determine to be charged by capacitor or battery.Or it is also possible to capacitor Two substrates of device and the both ends connection of battery, and when the electricity of capacitor be greater than the first default electricity when capacitor electricity Pressure is just greater than the discharge voltage of battery, i.e., when the electricity of capacitor is greater than the first default electricity, capacitor fills for battery Electricity, when the electricity of capacitor is less than the first default electricity, capacitor can not be to charge the battery.Optionally, the first default electricity It can be the 90% of the total electricity that capacitor can store, can also be exactly the total electricity that capacitor can store.
In some alternative embodiments, said supply unit 20, for detecting capacitor in described control unit Electricity passes through the capacitor when being higher than the second default electricity be encoder power supply, detects capacitor in described control unit It is encoder power supply by the battery when electricity of device is not higher than the second default electricity.Specific second default electricity Amount can be 0, i.e., again by electric power storage tank discharge after capacitor discharge, the second default electricity is also possible to be greater than 0, specifically It is determined according to the required supply voltage of encoder, guarantees the supply voltage of capacitor not less than electricity required for encoder Pressure, the voltage of capacitor is directly proportional to its electricity, and when electricity reduces, voltage can also be reduced, therefore sets the second default electricity, To prevent because condenser voltage reduction leads to encoder operation irregularity, and battery is usually operated at the linear of lithium battery Area, voltage and electricity are almost directly proportional, prevent the problem of supply voltage deficiency by setting the blanking voltage of battery.
In some alternative embodiments, the energy-storage units further include: discharge load;When the capacitor is the volume When code device power supply, the battery carries out pre-arcing by the discharge load;
Specifically, and battery will form passivating film inhibition in the state of not consuming electric power for a long time, on electrode surface Naturally it discharges, causes the initial phase voltage of electric power storage tank discharge very low, that is, voltage delay phenomenon occur, voltage delay will lead to Encoder operation irregularity solves the problems, such as this in such a way that not timing allows electric power storage tank discharge in the prior art, but undoubtedly unrestrained in this way Power-consuming amount, and be to first pass through capacitor discharge to pass through electric power storage tank discharge again in the application, in the present embodiment, so when capacitor is put Show that battery will probably need to discharge when electric, pre-arcing is carried out by discharge load at this time, to prevent voltage Lag has been accomplished to shoot the arrow at the target, solved in the prior art because cannot know when to need constantly to be put in advance using battery Caused by electricity the problem of electric quantity loss.
In some alternative embodiments, when the electricity of the battery is more than that third presets electricity, the battery It is discharged by the discharge load.In the present embodiment, when the electricity of battery is more than that the default electricity of third carries out forcing to put The reason of electricity includes: that energy when preventing accumulator electric-quantity is excessively high from leading to not recycle motor braking causes to burn circuit, another Aspect, reservoir are not suitable for long-term preservation in higher state of charge, and by taking battery is lithium battery as an example, the electricity of battery is excessively high, Then lithium ion is embedded in the intracell of cathode for a long time, causes lattice deformability, lithium ion can not the deintercalation from the lattice of cathode, cause Permanent capacitance loss, so the electricity of battery should be maintained at 40-60% or so, optimum keeps battery-active, therefore the Three default electricity can be the 40%-60% of battery total electricity.
In some alternative embodiments, the encoder has main power source, for powering for the encoder;
Said supply unit is used in main power source power-off, is the encoder with the electric energy in the energy-storage units Power supply.
The application also proposes a kind of encoder, any power supply unit proposed including the application.The encoder is excellent Choosing is photoelectric encoder.
The application also proposes a kind of servo-system, including servo-driver, servo motor, encoder and power supply unit, institute State power supply unit be the application propose it is any as described in power supply unit;
Alternatively, including servo-driver, servo motor and encoder, the encoder is any volume that the application proposes Code device.
In order to better illustrate the beneficial effect of the application, a servo-system set forth below, which includes servo Motor, servo-driver, photoelectric encoder, control unit, energy-storage units and discharge cell, wherein servo-driver is used for watch It takes motor and driving signal is provided, servo motor rotates or stops under the control of driving signal, generates in servo motor emergency stop Energy carry out recycling storage by energy-storage units, energy-storage units include capacitor and lithium battery, first pass through capacitor and charge, It is charged after capacitor charging is full by lithium battery, counts multi-turn information to power for photoelectric encoder.In servo electricity When machine emergency stop, whether control unit detection capacitor is fully charged, controls after capacitor is full of and is charged by lithium battery.
In servo motor braking, in order to protect circuit, most of driver can all be carried out using braking resistor at present Electric discharge, the application removes braking resistor, and it is more that energy that motor braking generates by capacitor is directly fed photoelectric encoder record Circle, the utilization rate for eliminating and not only having reduced energy loss from the process for being charged to electric discharge, improve energy, but also improve power supply efficiency.Cause Different for the watt level of motor, the energy that when braking generates is also different, after detecting the full electricity of capacitor using control unit, control Switch charging circuit, remaining synchronous energy supply lithium battery is charged, to be photoelectricity after electricity exhausts in capacitor Encoder prevents from burning circuit because driver does not have braking resistor to discharge in time for electrographic recording multi-turn.Due to photoelectric encoder Energy consumption it is very low, this portion of energy that motor emergency stop generates is sufficient for its complete record multi-revolution data.
The problem of not only having can solve photoelectric encoder dry cell periodic replacement frequent maintenance in this way, but also can reduce waste and old dry Battery can not problem of environmental pollution caused by fast degradation, it is often more important that, remove the braking resistor of driver, saving is produced into This, is directly powered using storage capacitor, improves capacity usage ratio and power supply efficiency, while duplicate supply system guarantees multi-turn position The reliability of record.
As shown in figure 4, the application also proposes that a kind of method of supplying power to of encoder, the encoder are connected to motor, comprising:
S11: the electric energy that generates and energy storage is stored in when motor is in braking low speed state, when recycling motor braking reduction of speed In unit;
S12: being encoder power supply using the electric energy in energy-storage units.
In some alternative embodiments, the energy-storage units include battery and capacitor;
The method of supplying power to further include:
The electricity in the capacitor is detected, when the electricity of the capacitor is lower than the first default electricity, using described The electric energy of capacitor storage recycling;When the electricity of the capacitor is not less than the first default electricity, deposited using the battery Store up the electric energy of recycling.
It in some alternative embodiments, the use of the electric energy in the energy-storage units is encoder power supply, comprising:
Passing through the capacitor when the electricity of capacitor is higher than the second default electricity is encoder power supply, in capacitor It is encoder power supply by the battery when electricity of device is not higher than the second default electricity.
In some alternative embodiments, further includes:
When the capacitor is that the encoder is powered, the battery carries out pre-arcing by discharge load;
And/or when the electricity of the battery is more than that third presets electricity, the battery is carried out by discharge load Electric discharge.
In some alternative embodiments, the encoder has main power source, for powering for the encoder;
Said supply unit is used in main power source power-off, is the encoder with the electric energy in the energy-storage units Power supply.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.

Claims (12)

1. a kind of power supply unit of encoder, the encoder are connected to motor characterized by comprising
Energy-storage units, the electric energy for being generated when recycling motor braking reduction of speed when the motor is in braking low speed state;
Power supply unit is powered for using the electric energy in the energy-storage units for the encoder.
2. the power supply unit of encoder according to claim 1, which is characterized in that further include: control unit;
The energy-storage units, including battery and capacitor;
Described control unit is used to detect the electricity in the capacitor, when the electricity of the capacitor is lower than the first default electricity When, using the electric energy of capacitor storage recycling;When the electricity of the capacitor is not less than the first default electricity, using institute State the electric energy of accumulators store recycling.
3. the power supply unit of encoder according to claim 2, which is characterized in that
Said supply unit passes through institute when for detecting that the electricity of capacitor is higher than the second default electricity in described control unit Capacitor is stated as encoder power supply, detects the electricity of capacitor not higher than the second default electricity in described control unit When, it is encoder power supply by the battery.
4. the power supply unit of encoder according to claim 3, which is characterized in that the energy-storage units further include: electric discharge Load;
When the capacitor is that the encoder is powered, the battery carries out pre-arcing by the discharge load.
5. the power supply unit of encoder according to claim 1-4, which is characterized in that
The encoder has main power source, for powering for the encoder;
Said supply unit is used in main power source power-off, is encoder confession with the electric energy in the energy-storage units Electricity.
6. a kind of encoder, which is characterized in that including power supply unit a method as claimed in any one of claims 1 to 5.
7. a kind of servo-system, which is characterized in that
Including servo-driver, servo motor, encoder and power supply unit, the power supply unit are as claim 1-5 is any The power supply unit;
Alternatively, including servo-driver, servo motor and encoder, the encoder is the encoder in claim 6.
8. a kind of method of supplying power to of encoder, the encoder are connected to motor characterized by comprising
It the electric energy that generates and is stored in energy-storage units when motor is in braking low speed state, when recycling motor braking reduction of speed;
It the use of the electric energy in the energy-storage units is encoder power supply.
9. the method for supplying power to of encoder according to claim 8, which is characterized in that
The energy-storage units include battery and capacitor;
The method of supplying power to further include:
The electricity in the capacitor is detected, when the electricity of the capacitor is lower than the first default electricity, using the capacitor The electric energy of device storage recycling;When the electricity of the capacitor is not less than the first default electricity, returned using the accumulators store The electric energy of receipts.
10. the method for supplying power to of encoder according to claim 9, which is characterized in that use the electricity in the energy-storage units It can be that the encoder is powered, comprising:
Passing through the capacitor when the electricity of capacitor is higher than the second default electricity is encoder power supply, in capacitor It is encoder power supply by the battery when electricity is not higher than the second default electricity.
11. the method for supplying power to of encoder according to claim 10, which is characterized in that further include:
When the capacitor is that the encoder is powered, the battery carries out pre-arcing by discharge load.
12. according to the method for supplying power to of the described in any item encoders of claim 8-11, which is characterized in that
The encoder has for the main power source for encoder power supply;
It is encoder power supply with the electric energy in the energy-storage units in main power source power-off.
CN201910718265.8A 2019-08-05 2019-08-05 Method of supplying power to, device, encoder and the servo-system of encoder Pending CN110311460A (en)

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Application Number Priority Date Filing Date Title
CN201910718265.8A CN110311460A (en) 2019-08-05 2019-08-05 Method of supplying power to, device, encoder and the servo-system of encoder

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CN110888357A (en) * 2019-11-22 2020-03-17 珠海格力智能装备有限公司 Robot control method and device
CN111457946A (en) * 2020-05-21 2020-07-28 哈尔滨理工大学 Self-generating magnetoelectric encoder
CN111865000A (en) * 2020-08-04 2020-10-30 华中科技大学 Motor encoder power supply method and system for getting power from neutral point of output end of frequency converter
CN115514084A (en) * 2022-11-03 2022-12-23 广东隆崎机器人有限公司 Multi-power-supply safety module of six-axis robot and control method thereof

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CN104660112A (en) * 2014-11-27 2015-05-27 杭州电子科技大学 Control circuit for supplying motor brake energy to direct-current load in real time
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Publication number Priority date Publication date Assignee Title
CN110888357A (en) * 2019-11-22 2020-03-17 珠海格力智能装备有限公司 Robot control method and device
CN111457946A (en) * 2020-05-21 2020-07-28 哈尔滨理工大学 Self-generating magnetoelectric encoder
CN111865000A (en) * 2020-08-04 2020-10-30 华中科技大学 Motor encoder power supply method and system for getting power from neutral point of output end of frequency converter
CN115514084A (en) * 2022-11-03 2022-12-23 广东隆崎机器人有限公司 Multi-power-supply safety module of six-axis robot and control method thereof

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