GB948467A - Electromagnetic brake control circuit - Google Patents
Electromagnetic brake control circuitInfo
- Publication number
- GB948467A GB948467A GB3959460A GB3959460A GB948467A GB 948467 A GB948467 A GB 948467A GB 3959460 A GB3959460 A GB 3959460A GB 3959460 A GB3959460 A GB 3959460A GB 948467 A GB948467 A GB 948467A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- coil
- brake
- control signal
- circuit
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
948,467. Protecting transistor switching circuits. PYE Ltd. Nov. 15, 1961 [Nov. 17, 1960], No. 39504/60. Heading H3T. [Also in Division F2] In a circuit for controlling the coil L1 of an electromagnetic brake in order to give a controlled degree of braking, the coil L1 is connected in series with a transistor TR1, the conductance of which is controlled by a control signal applied between terminals A and B so as to give a braking effect proportional to the signal. The voltage supply is derived from a bridge rectifier circuit BR and a condenser C1 and resistors R1, R2 and R3 constitute a bias network which bottoms the transistor TR1 when no control signal is applied to it so that maximum current flows through the transistor TR1 to the brake coil L1 to apply the brake. Alternatively, in an arrangement in which the brake is on when the coil is de-energized, the bias network is disposed to cut off transistor TR1 in the absence of a control signal. Diodes D1, D2 serve to protect transistor TR1 from back E.M.F.'s developed across brake coil L1 when rapid changes in control signal occur. The sensitivity of the circuit can be increased by the provision of a further transistor in cascade with the first transistor TR1, Fig. 2 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3959460A GB948467A (en) | 1960-11-17 | 1960-11-17 | Electromagnetic brake control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3959460A GB948467A (en) | 1960-11-17 | 1960-11-17 | Electromagnetic brake control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB948467A true GB948467A (en) | 1964-02-05 |
Family
ID=10410407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3959460A Expired GB948467A (en) | 1960-11-17 | 1960-11-17 | Electromagnetic brake control circuit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB948467A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5075356A (en) * | 1973-11-05 | 1975-06-20 | ||
| EP0096131A1 (en) * | 1982-06-09 | 1983-12-21 | Sanmeidenki Kabushikikaisha | Process and circuit for exciting solenoid coil |
| GB2242587A (en) * | 1990-02-01 | 1991-10-02 | Mole Valley Systems Ltd | Switching circuits |
-
1960
- 1960-11-17 GB GB3959460A patent/GB948467A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5075356A (en) * | 1973-11-05 | 1975-06-20 | ||
| EP0096131A1 (en) * | 1982-06-09 | 1983-12-21 | Sanmeidenki Kabushikikaisha | Process and circuit for exciting solenoid coil |
| GB2242587A (en) * | 1990-02-01 | 1991-10-02 | Mole Valley Systems Ltd | Switching circuits |
| GB2242587B (en) * | 1990-02-01 | 1994-05-25 | Mole Valley Systems Ltd | Power control circuit for reactive loads |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1030632A (en) | Apparatus for and method of zero switching | |
| GB1497730A (en) | Pulse width modulated signal amplifier arrangements | |
| GB1031465A (en) | Alternating current overload protection circuits | |
| GB1257318A (en) | ||
| GB957699A (en) | Circuit arrangement for regulating the speed of miniature electric dc-motors | |
| GB948467A (en) | Electromagnetic brake control circuit | |
| GB940086A (en) | Improvements in or relating to voltage monitoring devices | |
| GB547304A (en) | Electric circuit control | |
| GB1126951A (en) | A voltage regulated supply circuit | |
| GB736985A (en) | Improvements in electric control circuits | |
| GB1006314A (en) | Voltage threshold detector | |
| GB835834A (en) | Improvements in or relating to electrical generator regulating systems, especially for mechanically propelled vehicles | |
| GB886008A (en) | Electro-magnetic relay circuits | |
| GB1467615A (en) | Voltage sensitive trigger circuit | |
| GB851394A (en) | Improvements in or relating to electric amplifiers | |
| GB1071633A (en) | Means for comparing electrical signals | |
| GB912616A (en) | Improvements in or relating to circuitarrangementsfor supplying a voltage of constant value to a load | |
| GB800399A (en) | Improvements in logical circuits employing transformers | |
| GB1151125A (en) | Improvements in or relating to Ignition Systems. | |
| GB1099014A (en) | Improvements in or relating to electrical pulse-stabilising circuits | |
| GB1064942A (en) | Improvements in and relating to electric power supply apparatus | |
| GB758729A (en) | Improvements in and relating to electrical control circuits | |
| GB975656A (en) | Improvements relating to pulse-frequency controlled switch devices | |
| GB1065692A (en) | Improvements in and relating to electric supply apparatus | |
| JPS5733829A (en) | Switching circuit |