GB1364664A - Electric hair clipper with permanent magnet motor - Google Patents
Electric hair clipper with permanent magnet motorInfo
- Publication number
- GB1364664A GB1364664A GB5483371A GB5483371A GB1364664A GB 1364664 A GB1364664 A GB 1364664A GB 5483371 A GB5483371 A GB 5483371A GB 5483371 A GB5483371 A GB 5483371A GB 1364664 A GB1364664 A GB 1364664A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- scr
- speed
- load
- hair clipper
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/145—Hand-held machine tool
-
- 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
- H02P7/18—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 by master control with auxiliary power
- H02P7/24—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 by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—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 by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—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 by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/292—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 by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
- H02P7/293—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 by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC using phase control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dry Shavers And Clippers (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
1364664 Dynamo-electric machines; controlling rectifiers; control of DC motors WAHL CLIPPER CORP 25 Nov 1971 [3 Dec 1970] 54833/71 Headings H2A H2J and H2F [Also in Division B4] An electric hair clipper includes a D.C. electric motor with a permanent magnet stator field assembly 30, Fig. 1, having an L/D ratio in excess 'of 1.25 and a diameter less than 1À25 inches, the motor further including a commutator 33 connected to a wound rotor 32 energized from a power supply connected to the A.C. mains and arranged to cause the motor to have a no load speed at least 15% below the design no-load speed of the motor. The hair clipper has a two part casing 11 in the lower part 12 of which the motor is mounted by straps 37, 38, 39 secured to bosses on the casing and passing over bearings 35, 36 and stator 30 respectively. The stator has a split cylindrical housing 50 in which are mounted two magnetized members 51, 52 with their magnetic axes offset by between five and fifteen degrees. The rotor drives the movable cutting blade 16 through a cam. The power supply includes a bridge rectifier 83, 84, 85, 86, Fig. 6, in the output arm of which are connected the rotor winding 56 and, as shown, an SCR 90. The conduction angle of the SCR is determined by an RC network 94, 95, 96 and 91, the voltage across capacitor 91 firing a bi-lateral diode 106 which in turn triggers the SCR. The no-load speed is set by the variable resistor 96. In use, variation of potentiometer 95 allows speed variation. 95 may be replaced by fixed resistors. The motor current is increased with mechanical load by increasing the conduction angle of SCR 90. Increasing load reduces motor speed; back e.m.f. of winding 56 falls and charging rate of capacitor 91 increases. The SCR and its associated circuitry may be replaced by a Zener diode (76) in parallel with a switch (78), Fig. 5 (not shown), the arrangement providing two speeds according to whether the switch is open or closed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9490370A | 1970-12-03 | 1970-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1364664A true GB1364664A (en) | 1974-08-29 |
Family
ID=22247829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5483371A Expired GB1364664A (en) | 1970-12-03 | 1971-11-25 | Electric hair clipper with permanent magnet motor |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA964852A (en) |
| DE (1) | DE2159494A1 (en) |
| GB (1) | GB1364664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2424203A (en) * | 2005-03-18 | 2006-09-20 | Sunbeam Products Inc | Hair clipper with multiple speeds |
-
1971
- 1971-11-24 CA CA128,461A patent/CA964852A/en not_active Expired
- 1971-11-25 GB GB5483371A patent/GB1364664A/en not_active Expired
- 1971-12-01 DE DE19712159494 patent/DE2159494A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2424203A (en) * | 2005-03-18 | 2006-09-20 | Sunbeam Products Inc | Hair clipper with multiple speeds |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2159494A1 (en) | 1972-06-08 |
| CA964852A (en) | 1975-03-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |