关于电源的定义

202meng

广东安规检测
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对于电源的概念，一直很模糊，医用设备电气安全通用要求中也没有明确的解释，想请教各位前辈，对于外部电源是怎样界定的，如果只作为充电功能而不能单独为医用设备供电，这样的设备算作外部电源吗？医用设备自身又属于外部电源供电设备吗？谢谢各位的指导！
/ N/ v7 _- {# d# j8 }. b! z

cny0933

I think your question can refer to EN60601-1/IEC60601-1 in 4.10.2.
- X9 b  o# I+ l( E+ q5 {' y: d3 LPlease correct me if any.
Thanks,

For ME EQUIPMENT intended to be connected to SUPPLY MAINS, the following RATED voltages
3 [! b# j4 `$ A' Gshall not be exceeded:
– 250 V for HAND-HELD ME EQUIPMENT;
– 250 V d.c. or single-phase a.c. or 500 V polyphase a.c. for ME EQUIPMENT and ME SYSTEMS
with a RATED input ≤ 4 kVA; or
' P& k) t# ^$ b. g6 o/ k& i– 500 V for all other ME EQUIPMENT and ME SYSTEMS.
. D1 B/ g# R0 F8 KSUPPLY MAINS in this standard shall be assumed to have the following characteristics:
– overvoltage category II for mains transients unless a higher category is specified by the
' r  H  d% C, E4 ?MANUFACTURER;
– no voltage in excess of 110 % or lower than 90 % of the NOMINAL voltage between any of
) Z0 f  x# p  Rthe conductors of the system or between any of these conductors and earth (see 7.9.3.1);
: f0 H6 F) p& k4 D( ~8 RNOTE 1 IEC 60601-1-2 contains requirements and tests for voltage dips, short interruptions and voltage
, @% l6 h% _& h7 n+ `$ q- ?variations on the SUPPLY MAINS. See also 1.3.
– voltages that are practically sinusoidal and forming a practically symmetrical supply
+ B; ~8 Y2 g5 b: E0 ssystem in case of polyphase supply;
' m( J, O. c7 K2 u/ l: E& V– a frequency of ≤ 1 kHz;
– a frequency deviation of ≤ 1 Hz from the NOMINAL frequency up to 100 Hz and ≤ 1 % from
the NOMINAL frequency from 100 Hz to 1 kHz;
– the protective measures as described in IEC 60364-4-41;
NOTE 2 If ME EQUIPMENT or an ME SYSTEM is intended to be operated from a SUPPLY MAINS with
characteristics different from the SUPPLY MAINS described in this subclause, additional safety measures could
be necessary.
# t1 H5 v+ F3 Z% \3 k– a d.c. voltage (as measured by a moving coil meter or equivalent method) having a peakto-
peak ripple not exceeding 10 % of the average value.
Where peak-to-peak ripple exceeds 10 % of the average value, the peak voltage has to be
# c* H8 ?1 ?) u- x2 q/ ]9 @+ rapplied.

cyk8421

根据安规标准电源分：1.电网供电的设备，2.内部电源，特定电源，而无你说的外部电源，其实外部电源应该就是1.电网供电的设备

amu_zhu

个人意见，仅供参考
如果一个设备，使用适配器供电，产商呢又不提供适配器，
7 p: {2 p3 Q$ @于是呢，就只定义主机为需认证的设备，也就是说，适配器是额外的设备，跟厂商没关系。
在这种情况下，可以理解为此主机是用外部电源供电

cny0933

我想我貼的應該是電網供電的部份，如果有錯請指正!
4 P5 V+ D* _0 p* }2 P' v' P  sThanks,

cyk8421

用适配器供电的设备也被称为由特定电源供电。

202meng

amu_zhu 发表于 2013-2-4 08:47
$ d/ R, w  d+ v个人意见，仅供参考
- l" v9 v* u. y; k3 m# b' Y* v) b如果一个设备，使用适配器供电，产商呢又不提供适配器，
于是呢，就只定义主机为需认 ...

& @7 f5 x+ z* c# m" v0 t那如果设备是锂电池供电，充电器只做充电作用，不能单独供电，这样的设备，应该算作内部电源供电设备吗？还是也可以算作外部电源供电呢？

202meng

cyk8421 发表于 2013-2-4 19:04
+ Q* k- x. e! |* l, H  c用适配器供电的设备也被称为由特定电源供电。

+ @9 O, ^- M! U4 y/ N+ r  W5 K充电器算作特定电源供电吗？关于特定电源有没有明确的范围或定义呢？这个我始终没有找到。。还希望高手能够指点

202meng

cny0933 发表于 2013-2-4 15:48
& v! w; \+ r% m+ |- `1 d3 @- E我想我貼的應該是電網供電的部份，如果有錯請指正!
) o+ u! f3 L! b; h& p9 i5 ?Thanks,

* b  u; f8 H' b! U! g! _: C是的！用于ME设备或系统的供电网

cyk8421

特定电源的定义：不是供电网，且与供电网隔离的电源