GB2265507A - Dc motor speed control system - Google Patents

Dc motor speed control system Download PDF

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Publication number
GB2265507A
GB2265507A GB9205901A GB9205901A GB2265507A GB 2265507 A GB2265507 A GB 2265507A GB 9205901 A GB9205901 A GB 9205901A GB 9205901 A GB9205901 A GB 9205901A GB 2265507 A GB2265507 A GB 2265507A
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United Kingdom
Prior art keywords
pole
diode
switch
motor
positive
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Withdrawn
Application number
GB9205901A
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GB9205901D0 (en
Inventor
Tai-Her Yang
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Individual
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Individual
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Priority to GB9205901A priority Critical patent/GB2265507A/en
Publication of GB9205901D0 publication Critical patent/GB9205901D0/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

A DC motor speed control system has sets of diodes DB1 and a switch SW1 to enable series/parallel connections to be made so as to control the speed of the motor. Other switch arrangements are described Figs. 2-4. <IMAGE>

Description

TITLE IMPROVEMENT OF DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIES-PARALLEL POSITIVE-PHASE BIAS DIODE SUMMARY OF THE INVENTION: The device of DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE provides a gradually speeding motor having a plurality of taps and changable positive phase series or parallel diode set serialized to armature of load DC motor with a control switch element which can turn on the circuit, transmit power, and gradually decrease the positive phase bias value of diode set between motor and power supply so as to gradually speed the motor. By means of this function, DC motor can properly adjust its speed for a low speed operation.
This device of DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIES-PARALLEL POSITIVE-PHASE BIAS DIODE has a trait that when diode set has a rated block of larger output, it is parallel so as to increase its resistance current.
BRIEF DESCRIPTION OF THE DRAWINGS FIG 1 shows embodiment 1 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
FIG 2 shows embodiment 2 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
FIG 3 shows embodiment 3 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
FIG 4 shows embodiment 4 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based.on the principle that diode set can be series, parallel, and switch-changing.
DETAILED DESCRIPTION OF THE INVENTION: Mini DC motor is widely used in the application of electric tools, mechanics, machhines, and appliances.
However, in many occasions, a kind of slowly driving to reduce impact on a motor, or to fit with specific load is required. The conventional method is to adjust the driving by falling down resistance, or by serializing load with power crystal. However, unless said two methods have good feed-bak control, they will make speed-adjusting in slow speed situation decayed, and feed-back control often increases the cost, or results in a phenomenon of hunting.
The device of DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE provides an improved device of low cost, high stability, and better speed adjusting.
The main traits of the device is as follows: At least two sets or more than two sets of diode can be directly positive-phase serialized or parallel led by switch control and then serialized again to the amature of DC motor. The positive phase output or input points of diode sets have a selected tap connected with distribution contact of control-switch which controls to conduct to and serialize or parallel with the tap, and this control-switch can provide sequence-switch load and different diode bias value between power supplies, said switch has open circuit point and contact points of series and parallel switch in sequence which is leg-contacted with diode tap, and by means of short circuit between displaced, switched, or leg-contacted snaps so as to change diode biias value.Motor amature and positive phase serial diode are positive phase serialized through control-switch and then parallelled with DC power supply; when we operate and control the switch, output of power supply reaches the other end of the power supply through diode into the motor, at this time motor gradually starts and operates, and in reponse to the operation of switch, it is switched to conduct with series diode and gradually decreases its bias value, and at the time when middle bloch motor current is gradually increased, it turns into a parallel situation with a tap switch, its conducting flow is increased, but still gradually increases its bias value in response to the switch control so as to speed the motor, because it is easy to control, and its applied elements cost little money and their quality is steadily fine, it can be used widely to control the operation of mini electric tools, mechanics, and househood appliances.
FIG 1 shows embodiment 1 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
In FIG 1, switch SW1 has two sets of slide switch poles A and B, separately sliding on matching switch poles, in which pole A matches with slide switch on switch pole f and switch poles c, b, a, of sequence arrangement so as to form a first slide switch element, and a second slide switch element which is formed by sequence arranged poles d, e, f and sequence arranged poles c, b, a which are slide-switched to the matching pole B, diode set DB1 also has two units, the firstt diode unit is a series diode which consists of negative input end a, positive output end c, and middle tap end b, the second diode unit is a diode similar to the first diode and consists of negative input end f, positive output end d, and middle tap end e, tap ends, a, b, c, d, e, f of two diode sets are connected with switch's cut-off contact points a, b, c, d, e, f.
Said pole B is completely housed and can synchronously be driven with pole A as follows: 1. switch SW1 is disposed at "0" and circuit is cut off; 2. switch SW1 is disposed at "1" , two diode sets c, f are conducted by pole A, power supply enters from a through d and then runs to the amature and makes a lowest speed output for the motor; 3. switch SW1 is disposed at "2", motor makes a lowest speed output; 4. switch SW1 is disposed at "3" , two diode sets are series, motor makes a medium speed output; 5. switch SW1 is disposed at "4" , motor makes a secondary high speed output; 6. switch SW1 is disposed at "5" , motor makes a high speed output.
If needed, thermal protection temperature control switch THSW can be attached to said diode sets so as to protect diode sets and motor against over load.
FIG 2 shows embodiment 2 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
In FIG 2, polee B in FIG 1 is changed and replaced in a way that cut-off pole d and floating contact line are connected to the amature; and its pole B can conduct in sequence to c,d or b, e or a, f, and can replace the completely housed pole in FIG 1.
FIG 3 shows embodiment 3 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
In FIG 3, use three-row cut-off contact points to form switch SW1, except the diode sets similar to those in FIG 1, its structure has the following traits -- the first row cut-off pole consists of an independently disposed block "1" connected to d, an independently disposed block "2" connected to e, an independently disposed block "3" connected to f; -- the second row cut-off pole consists of an independently disposed block "1" connected to c, an independently disposed block "2" connected to b, an independently disposed block "3" "4." "5" connected to a and positive end of DC power supply; -- the third cut-off pole consists of cut-off polar piece disposed.at blocks "1"--"5" which connect to f; -- pole A includes the second and third rows, pole B includes the first and the second rows; pole B iis delay pole A, 2 block; that is, when pole A is at "3", pole B is at "1"; pole B and cut-off pole d are similarly connected to the positive end of amature; -- negative end of DC power supply connects to negative end of motor, cut-off contact point a connects to positive end of DC power supply.
FIG 4 shows embodiment 4 in which a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing.
In FIG 4, two-row cut-off contact points form switch SWl, in addition to the diode similar to that in FIG 1, structure of the circuit has the following traits: -- the first row cut-off pole consists of an independently disposed block "1" connected to d, an independently disposed block "2" connected to e, an independently disposed block "3" connected to f; -- the second row cut-off pole consists of an independently disposed block "1" connected to c, an independently disposed block "2" connected to b, an independently disposed block "3" "4" "5" connected to a and positive end of DC power supply; -- pole A is connected to f through floating conductive line, and when it is at "1" "2" '3)' blocks, it will be conducted in sequence to c, b, a and slide on second row cut-off pole; pole B is delay pole A, 2 block; that is, when pole A is at "2", poleB is at "0"; pole B and cut-off pole d are similarly connected to the positive end of amature; -- negative end of motor connects to negative end of DC power supply, cut-off contact point a connects to positive end of DC power supply.
All above-illustrated FIGs are embodiments of five-block switch, if needed, according to said series-parallel principle, switch blocks can be either increased or decreased to meet the demand, only parallel diode adjacent to the high speed block must be maintained.
In conclusion, the present device provides a more advanced, reliable, device than before. It costs less and can adjust speed better than the conventional. It device provides a gradually speeding motor having a plurality of taps and changable positive phase series or parallel diode set serialized to armature of load DC motor with a control switch element. It makes DC motor more unique and useful, and it is widely used for mini motors.

Claims (6)

CLAIMS: WHAT IS CLAIMED IS: 1. DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE comprising a gradually speeding motor having a plurality of taps and changable positive phase series or parallel diode set serialized to armature of load DC motor with a control switch element which can turn on the circuit, transmit power, and gradually decrease the positive phase bias value of diode set between motor and power supply so as to gradually speed the motor; by means of this function, DC motor can properly\adjust its speed for a low speed operation;DC motor control circuit further comprising: at least two sets or more than two sets of diode can be directly positive-phase serialized or parallelled by switch control and then serialized again to the amature of DC motor, the positive phase output or input points of diode sets have a selected tap connected with distribution contact of control-switch which controls to conduct to and serialize or parallel with the tap, and this control-switch can provide sequence-switch load and different diode bias value between power supplies, said switch has open circuit point and contact points of series and parallel switch in sequence which is leg-contacted with diode tap, and by means of short circuit between displaced, switched, or leg-contacted snaps so as to change diode bias value.Motor amature and positive phase serial diode are positive phase serialized through control-switch and then parallelled with DC power supply; 2. As claimed in caim 1, DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE wherein switch SW1 has two sets of slide switch poles A and B, separately sliding on matching switch poles, in which pole A matches with slide switch on switch pole f and switch poles c, b, a, of sequence arrangement so as to form a first slide switch element, and a second slide switch element which is formed by sequence arranged poles d, e, f and sequence arranged poles c, b, a which are slide-switched to the matching pole B, diode set DB1 also has two units, the first diode unit is a series diode which consists of negativve input end a, positive output end c, and middle tap end b, the second diode unit is a diode similar to the first diode and consists of negative input end f, positive output end d, and middle tap end e, tap ends, a, b, c, d, e, f of two diode sets are connected with switch's cut-off contact points a, b, c, d, e, f; said pole B is completely housed and can synchronously be driven with pole A as follows:
1. switch SWl is disposed at "0" and circuit is cut off;
2. switch SW1 is disposed at "1" , two diode sets c, f are conducted by pole A, power supply enters from a through d and then runs to the amature and makes a lowest speed output for the motor; 3. switch SW1 is disposed at "2", motor makes a lowest speed output; 4. switch SW1 is disposed at "3" , two diode sets are series, motor makes a medium speed output; 5. switch SW1 is disposed at "4" , motor makes a secondary high speed output; 6. switch SW1 is disposed at "5" , motor makes a high speed output; a thermal protection-temperature control switch THSW can be attached to said diode sets so as to protect diode sets and motor against over load.
3. As claimed in claim 1, DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE whereas a DC motor control circuit can be slowly driven by a series-parallel positive bias diode set, based on the principle that diode set can be series, parallel, and switch-changing; and pole B is changed and replaced in a way that cut-off pole d and floating contact line are connected to the amature; and itspole B can conduct in sequence to c,d or b, e or a, f, and can replace the completely housed pole in claim 2.
4. As claimed in claim 1, DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE wherein three-row cut-off contact points can be used to form switch SW1, in addition to the diode sets similar to those in FIG 1, its structure has the following traits -- the first row cut-off pole consists of an independently disposed block "1" connected to d, an independently disposed block "2" connected to e, an independently disposed block "3" connected to f; -- the second row cut-off pole consists of an independently disposed block "1" connected to c, an independently disposed block "2" connected to b, an independently disposed block "3" "4" "5" connected to a and positive end of DC power supply; -- the third cut-off pole consists of cut-off polar piece disposed at blocks "1"--"5" which connect to f;; -- pole A includes the second and third rows, pole B includes the first and the second rows; pole B is delay pole A, 2 block; that is, when pole A is at "3", pole B is at "1"; pole B and cut-off pole d are similarly connected to the positive end of amature; -- negative end of DC power supply connects to negative end of motor, cut-off contact point a connects to positive end of DC power supply.
5. As claimed in claim 1, DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE wherein two-row cut-off contact points form switch SW1, in addition to the diode similar to that in FIG 1, structure of the circuit has the following traits: -- the first row cut-off pole consists of an independently disposed block "1" connected to d, an independently disposed block "2" connected to e, an independently disposed block "3" connected to f; -- the second row cut-off pole consists of an independently disposed block "1" connected to c, an independently disposed block "2" connected to b, an independently disposed block "3" "4" "5" connected to a and positive end of DC power supply; -- pole A is connected to f through floating conductive line, and when it is at "1" "2" "3" blocks, it will be conducted in sequence to c, b, a and slide on second row cut-off pole; pole B is delay pole A, 2 block; that is, when pole A is at "2", pole B is at "0"; pole B and cut-off pole d are similarly connected to the positive end of amature; -- negative end of motor connects to negative end of DC power supply, cut-off contact point a connects to positive end of DC power supply.
6. As claimed in claim 1, DC MOTOR CONTROL CIRCUIT SLOWLY DRIVEN BY SERIAL-PARALLEL POSITIVE-PHASE BIAS DIODE wherein if needed, according to said series-parallel principle, switch blocks can be either increased or decreased to meet the demand, only parallel diode adjacent to the high speed block must be maintained.
GB9205901A 1992-03-18 1992-03-18 Dc motor speed control system Withdrawn GB2265507A (en)

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GB9205901A GB2265507A (en) 1992-03-18 1992-03-18 Dc motor speed control system

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GB9205901D0 GB9205901D0 (en) 1992-04-29
GB2265507A true GB2265507A (en) 1993-09-29

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051588A (en) * 1900-01-01
GB1283694A (en) * 1968-10-30 1972-08-02 Eaton Yale & Towne Battery operated industrial trucks
GB1353490A (en) * 1971-07-30 1974-05-15 Toyo Kogyo Co Control system for electric automotive vehicles
GB1399194A (en) * 1973-05-07 1975-06-25 Electricity Council Battery systems
GB2034988A (en) * 1978-11-21 1980-06-11 Outboard Marine Corp Current supply arrangements for direct current motors
WO1982001104A1 (en) * 1980-09-17 1982-04-01 J Wilson Multiple windings electrical motors controllers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051588A (en) * 1900-01-01
GB1283694A (en) * 1968-10-30 1972-08-02 Eaton Yale & Towne Battery operated industrial trucks
GB1353490A (en) * 1971-07-30 1974-05-15 Toyo Kogyo Co Control system for electric automotive vehicles
GB1399194A (en) * 1973-05-07 1975-06-25 Electricity Council Battery systems
GB2034988A (en) * 1978-11-21 1980-06-11 Outboard Marine Corp Current supply arrangements for direct current motors
WO1982001104A1 (en) * 1980-09-17 1982-04-01 J Wilson Multiple windings electrical motors controllers

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