(Yang Tao of Zhejiang gigantic magnetism) as electric car gain ground, the safe standard that electric car charges is rigidder and rigidder also, well-known, electric car charges to share 4 kinds of mode, mode because cannot provide effective protection,had been prohibited by public proclamation; Mode 2 be in mode on one foundation, charging case of a protection is provided on cabled yarn (IC-CPD) , when generating fault current, can undertake indication, protection; Mode 3 charge in order to communicate namely the means of picket charges; Mode 4 charge with dc namely the means of picket charges. With mode 2 for exemple, charge to assure the safety of the process, a lot of truckload factory especially plant of joint-stock car of foreign car plant and home, ask to be able to be opposite the leakage of electricity of dc 6mA undertakes protective, according to standard IEC 62752-2016. The leakage of electricity of the tradition detects the technology cannot realize dc 6mA detect, the sensor of RCMU series leakage of electricity of MAGTRON company can satisfy this one requirement, can detect other all sorts of complex and undee leakage of electricity that produce possibly (Type B leakage of electricity) . Graph 1 electric car charges Normal > at the same time, electric car mode controls protector on 2 charging cable (IC-CPD) belong to communication to be filled slow, can use trough electrovalency period of time to charge, IC-CPD basically is to be satisfied in do not suit installation to charge the garage of picket and reserve as a kind charge means, every electric car multiplies in principle to need to deploy with the car, use setting unlike charges picket is fixed in that way, the likelihood is to be in the garage, also may be have socket anyplace, the electromagnetism environment that so it faces will be more complex, the electromagnetism compatibility that need assures it is good (EMC) . Normal > and what leakage current sensor regards the most important implementation inside IC-CPD as function of protection of leakage of electricity is decisive yuan of parts of an apparatus, to charging safety of process go-between body defends the action with a crucial move, its EMC problem is needing to think again. According to the requirement of IEC 62752-2016 standard to EMC, IEC 61543 of basis of EMC test standard " Residual Current-operated Protective Device(RCDs) For Household And Similar Use-Electromagnetic Compatibility " . Namely the electromagnetism compatibility standard of family expenses and protector of electric current of similar utility the rest. The about EMC test requirement Normal >IEC 61543 provides is the ambient conditions that in pointing to as communal as low pressure electrified wire netting or equipment of similar line connective, happens, basically include phenomenon of phenomenon of low frequency electromagnetism, high frequency electromagnetism and electrostatic discharge. Phenomenon of low frequency electromagnetism includes change of amplitude of voltage of the wave between harmonic, humorous, signal, voltage, voltage change of frequency of lopsided, power source and voltage of inductive low frequency communicate electrified wire netting magnetic field of medium dc heft radiate; The one-way very short time that phenomenon of high frequency electromagnetism includes to send oscillation voltage or voltaic Ns form changes conduct (pulse group) , the one-way twinkling of Ms class and Us class changes conduct and twinkling changes oscillation electric current is high frequency radiation phenomenon; The likelihood when electrostatic discharge is aimed at low humidity collects the electrostatic discharge data that be in. Normal >IEC 61543 is right of protector of odd electric current electromagnetism compatibility experiment basically includes two fields, namely electromagnetism blasts off (EMI) and electromagnetism immunity to interference (EMS) experiments. IC-CPD protects a component as passivity, general interior does not have high frequency oscillator, won't emit radiation external, do not do EMI test commonly so. So need emphasizes the issue that considers EMS, we know, sensor is equipment of low n electron, of processing is fainter signal, power supply cord of leakage current sensor crosses sensor, although had sufficient electric segregation, but because size is small, PCB and distance of power supply cord are very close, disturb extremely easy coupling to arrive in sensor of B leakage current, below complex electromagnetism environment, the electromagnetism interference of outside minimum brings great error likely to output, wrong even result. Normal >IC-CPD EMC experiment is the problem that headaches quite in process of product certification test, the engineer is in optimize ceaselessly while PCB is designed, also want to choose yuan of parts of an apparatus with more outstanding immunity to interference, this shed immunity to interference of sensor electromagnetism field to raise taller requirement to leakage of electricity. Normal >IEC 61543 correspondence is GB 18499 " the protector of movement of odd electric current of family expenses and similar utility (RCD) electromagnetism compatibility " , adopting equation. Next graphs are the about radiation electromagnetism field experiment requirement in GB 18499. Normal > graph 3 GB18499 asks to pursue 4 GB/T 17626. In 3-2003 5.
1 content GB/T 17626.
3-2003 " electromagnetism is compatible experiment and measure immunity to interference of radiate of field of electromagnetism of technical radio frequency to experiment " in set 3 kinds of test class, respectively field of corresponding 1V/m, 3V/m, 10V/m is strong (GB/T 17626-2016 adds the 4th grade newly, corresponding field strong 30V/m) , the frequency limits of 80MHz~1GHz. Grade of correspondence of protector of movement of odd electric current 2, test site strong 3V/m. The sensor of RCMU series residual current that passes pair of MAGTRON companies has a test, actually immunity to interference of border electromagnetism radiate is in perpendicular 10V/m field is strong, the output in 80M~1GHz radiate frequency still can keep stable, won't affect it detect. Normal >IEC 62752 is the basic standard of a Type B IC-CPD actually, it comes to IC-CPD consider as the component outside the car, the EMC demand to it is so relative for lower still. We think 3V/m field is strong commonly is the requirement that business uses form product, 10V/m is demand of industrial level product, car plan step asks to amount to 100V/m above, different and truckload the demand of the factory is diverse also, arrive in 100V/m roughly between 140V/m. Actually we are in and truckload the discovery in the collaboration of the factory, IC-CPD serves as dynamoelectric distribute a part surely by what use a car, its responsibility main body is truckload factory, so although IC-CPD does not attribute the one part of the car, car plant still can ask with car plan step IC-CPD, and the sensor of RCMU leakage current of MAGTRON company is in some is truckload the IC-CPD of the factory is overall in the experiment, passed the test of 140V/m! Normal >Magtron is based on the plan of SoC chip whole of IFluxgate technology, charge for electric car yuan of parts of an apparatus or appliance that protection of B leakage of electricity offers on the safe side. Normal >normal Align=center> [bibliographical reference] Normal >[1] IEC 62752-2016 In-cable Control And Protection Device For Mode 2 Charging Of Electric Road Vehicles(IC-CPD)normal >[2] IEC 61543-1995 Residual Current-operated Protective Device(RCDs) For Household And Similar Use-Electromagnetic Compatibilitynormal >[3] GB/T 17626.
3-2003 electromagnetism is compatible experiment and measure Normal >[4] GB 18499 and similar utility (RCD) electromagnetism compatibility CNC Milling