EP 0851711 A4 19980701 -
Publication
Application
Priority
- RU 9600164 W 19960619
- RU 95110354 A 19950621
Abstract (en)
[origin: EP0851711A1] A clearance pulse is passed from a triggering unit (17) to a generator blocking unit (11), blocking a master generator (2) for a period sufficient for charging of the electrolytic capacitors of the filter of a power supply unit (6), after which the generator (2) is triggered and produces pulses of min. length. A sensor (12) passes a blocking pulse to the generator (2) during absence of an object. During presence of an object for heating, the generator is not blocked and a frequency tuning unit (13) sets the frequency of the generator according to the heated object and its action on an inductive loop (5). A power control unit (20) sets a determined length of pulses from the generator, to establish the required intensity of heating, while a power limiting unit (14) monitors the voltage from a pulsation level determn. unit (16). If the consumption current of an inverter (1) exceeds a set permitted value, the limiting unit (14) reduces the power through the control unit (20), preventing overloading of a set (4) of current switches. On reaching of the set temp, a load temp, sensor (2) is triggered and the temp. is maintained at the required level. After removal of the object from the working zone, the signal from the sensor (12) passes to the blocking unit, disconnecting the heater.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H05B 6/062 (2013.01); H05B 2213/07 (2013.01)
Citation (search report)
- [A] DE 3612707 A1 19861023 - SANYO ELECTRIC CO [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 015, no. 048 (C - 0802) 5 February 1991 (1991-02-05)
- See references of WO 9701261A1
Designated contracting state (EPC)
DE ES FR GB SE
DOCDB simple family (publication)
EP 0851711 A1 19980701; EP 0851711 A4 19980701; AU 6246196 A 19970122; BG 102165 A 19980831; BG 63359 B1 20011031; CZ 286611 B6 20000517; CZ 405397 A3 19980617; EA 000253 B1 19990225; EA 199800067 A1 19980827; HU P9802079 A2 19981228; HU P9802079 A3 20000328; LT 4373 B 19980825; LT 97192 A 19980525; PL 180559 B1 20010228; PL 324260 A1 19980511; WO 9701261 A1 19970109
DOCDB simple family (application)
EP 96921174 A 19960619; AU 6246196 A 19960619; BG 10216598 A 19980107; CZ 405397 A 19960619; EA 199800067 A 19960619; HU P9802079 A 19960619; LT 97192 A 19971209; PL 32426096 A 19960619; RU 9600164 W 19960619