STMicroelectronics STEVAL-IHT008V1 Скачать руководство пользователя страница 35

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UM2027

Test

points

DocID029048 Rev 1

35/37

Test points

The different test points available on the STEVAL-IHT008V1 are given in the table below.

Table 6: Test points

Reference

Designation

Definition

TP1

Line after EMI filter

TP2, TP21,

TP33

VCC_AC

TP3

HVDC

TP4

Line before EMI filter

TP5

OUT_ICL

A2 output of T_ICL

TP6

OUT1

A2 output of T1

TP7

OUT2

A2 output of T2

TP8

OUT3

A2 output of T3

TP9

OUT4

A2 output of T4

TP10

OUT5

A2 output of T5

TP11

HVDC/2

TP12

Neutral before EMI filter

TP13

Neutral after EMI filter

TP14,

TP24,TP29

GND_DC

TP15

Gate signal of T1

TP16

Gate signal of T2

TP17

Gate signal of T3

TP18

Gate signal of T4

TP19

Gate signal of T5

TP20

G_ICL

Gate signal of T_ICL

TP22

GND_AC

TP23

15V_DC

TP25

VCC_INS

TP26

Drain_viper

TP27

GND_INS

TP28

5V_DC

TP30

ZVS

TP31

VL1_MEAS

MCU input for line

measurement

TP32

VN1_MEAS

MCU input for neutral

measurement

TP34

MAX INRUSH CURRENT ORDER

Содержание STEVAL-IHT008V1

Страница 1: ...ng the startup phase This solution drastically reduces standby losses as the DC bus can be totally disconnected from the AC mains when it is not required The DC bus is easily turned off by turning off...

Страница 2: ...10 2 5 Possible board adaptations 11 2 5 1 ACST use and MOV removal 11 2 5 2 EMI filter and DC bus capacitors change 11 2 5 3 Power factor circuit connection 12 2 5 4 Motor Inverter connection 12 2 5...

Страница 3: ...diode bridge The AC switches T1 to T5 connected on AC side to control AC loads It should be noted that their drive reference A1 is also connected to the A1 terminal of T_ICL All A1 terminals are conn...

Страница 4: ...oard is also particularly interesting for applications where AC loads have to be controlled such as for valves fans pumps heating resistors etc Such applications include wet appliances washing machine...

Страница 5: ...lt two ACS108 8SN SOT 223 are used for T2 and T3 with a 5 5 mm copper area under the tab These devices can control an RMS load current up to 0 6 A This allows a 100 VA or 50 VA power load to be contro...

Страница 6: ...uncontrolled inrush current due to EMI noise IEC 61000 4 5 2 kV criteria A IEC61000 4 11 criteria A for dips down to 100 of the line voltage during 1 cycle criteria B for interrupts up to 300 cycles...

Страница 7: ...ays to limit inrush current and standby losses But thanks to the T_ICL Triac this function is already available by simply turning off this Triac Figure 5 Solution using relays to limit inrush current...

Страница 8: ...required by European directive 2005 32 EC The losses measured for case 3 are mainly due to the resistor divider circuit R9 R11 R14 R16 used to balance the voltage across the 2 series capacitors C1 an...

Страница 9: ...ant the rectifier to operate in a classic rectifier circuit do not plug the J7 jumper 2 Connect the AC load terminals if used to the associated headers e g for AC switch T1 refer to the N1 OUT1 label...

Страница 10: ...label in Figure 23 STEVAL IHT008V1 silk screen Top side remains lit while the HVDC voltage is above 50 V so the SW2 switch can be released and a new startup can begin as soon as this LED turns off 2...

Страница 11: ...are indeed pin to pin compatible The MOV used to protect the T1635T 8FP SIOV1 can be removed as the ACST1635T is an overvoltage protected device if the ACST1635 8FP is triggered in breakover mode the...

Страница 12: ...defined in Section 1 5 Operating range and performances 2 5 4 Motor Inverter connection An inverter or any other DC DC power converter can be added after the PFC or directly behind the HVDC bus outpu...

Страница 13: ...both inrush current limitation and power loss reduction Above and beyond the simple demonstration of the efficiency and the robustness of this solution by STMicroelectronics this front end circuit als...

Страница 14: ...STEVAL IHT008V1 circuit schematics UM2027 14 37 DocID029048 Rev 1 4 STEVAL IHT008V1 circuit schematics Figure 8 STEVAL IHT008V1 power side and insulated control schematic...

Страница 15: ...UM2027 STEVAL IHT008V1 circuit schematics DocID029048 Rev 1 15 37 Figure 9 STEVAL IHT008V1 control circuit schematic 1 of 3...

Страница 16: ...STEVAL IHT008V1 circuit schematics UM2027 16 37 DocID029048 Rev 1 Figure 10 STEVAL IHT008V1 control circuit schematic 2 of 3 Figure 11 STEVAL IHT008V1 control circuit schematic 3 of 3...

Страница 17: ...e level will be higher if it is not loaded and if the 15 V positive supply is loaded with its highest maximum current The current capabilities of the different outputs are for the whole operating rang...

Страница 18: ...ent a current close to 20 mA is already sunk from the VCC_AC supply This is not the case for the VCC_INS output The maximum VCC_AC voltage is reached when the SMPS 15V_DC output is loaded to the maxim...

Страница 19: ...variation for 230 V single phase grid according to IEC 61000 3 3 gives the associated maximum input current variation related to these different dmax levels To simplify the analysis it could be said...

Страница 20: ...y charged while the line current is kept low In the STEVAL_IHT008V1 MCU firmware the Triac turn on delay reduction step is constant from one half cycle to the following one This step is called Step_Ph...

Страница 21: ...he timer is launched both in count up and count down modes half of the desired value must be given in this parameter Next T_ICL turn on occurs 50 s sooner each time when the MAX_INRUSH CURRENT potenti...

Страница 22: ...to below 17 4 A but the IEC 61000 3 3 limit actually applies to the RMS current As the T_ICL Triac conducts for a few hundred microseconds each half cycle the RMS current is much lower than the peak v...

Страница 23: ...EVAL IHT008V1 board is programmed in order to comply with these different standard tests with the following strategy If the line voltage remains higher than 70 to the reference voltage measured at boa...

Страница 24: ...omponent damage Figure 16 a Board operation during 1 cycle line interruption and Figure 17 b Board operation during 2 cycle line interruption illustrate board operation during a 1 cycle a or 2 cycle b...

Страница 25: ...al voltage Number of cycles Required criteria by standard STEVAL IHT008V1 result 61000 2 1 environments 40 101 122 C B 70 251 302 C A Interruptions 0 2501 3002 C B EN55024 Information technology equip...

Страница 26: ...to this offset the images of the VL VL_IM and VN VN_IM remain positive That means the ICL demo board only requires a single voltage supply and not a supplementary negative one to measure VAC Figure 1...

Страница 27: ...voltage detection The TRIAC phase control needs to be synchronized with the AC line voltage The zero AC line voltage crossing detection uses the AC line voltage measurement Indeed the zero AC line vol...

Страница 28: ...AC voltage monitoring and zero voltage synchronisation UM2027 28 37 DocID029048 Rev 1 Figure 19 Zero AC line voltage crossing detection...

Страница 29: ...CTR must be chosen according to the equation below where IGT is the AC switch gate current and IO_MCU is the output current supplied by the MCU to control the optocoupler LED Given the AC switch gate...

Страница 30: ...r filter VCC_AC the power supply to provide the gate current to the AC switch VCE SAT Opto the transistor collector emitter of the optocoupler IGT the TRIAC gate current NPN is the NPN transistor gain...

Страница 31: ...UM2027 EN55014 test results DocID029048 Rev 1 31 37 10 EN55014 test results Figure 21 EMI noise test with 1000 W load Figure 22 EMI noise test without load...

Страница 32: ...Table 5 Bill of material Reference Part Value C1 C9 1000 F 250 V C2 C4 C5 C8 2 2 nF 440 VAC C6 C7 56 nF 300 V C10 1 nF 50 V C11 C14 1 F 25 V C13 C15 C38 1 nF 50 V C16 C17 C18 C19 C20 C21 C24 C26 C27...

Страница 33: ...der_ 2 54 mm pitch J7 4 way header _ 5 08 pitch J8 J11 J15 J18 J21 J12 J13 J17 2 way plug _ 5 08 pitch J9 J10 3 way plug _ 5 08 pitch J14 J19 4 way header _ 2 54 mm pitch J16 8 way header _ 2 54 pitch...

Страница 34: ...R51 10 k 0 125 W R52 R53 47 R 1 W R54 36 k 0 125 W R55 10 k 0 125 W R56 20 k 0 125 W R57 22 k 0 125 W R58 150 R 0 125 W SIOV1 S07K300 300 VAC SIOV2 S14K300 300 VAC SW1 SW2 SW3 SW4 SW5 micro_switch SW6...

Страница 35: ...put of T2 TP8 OUT3 A2 output of T3 TP9 OUT4 A2 output of T4 TP10 OUT5 A2 output of T5 TP11 HVDC 2 TP12 N Neutral before EMI filter TP13 N1 Neutral after EMI filter TP14 TP24 TP29 GND_DC TP15 G1 Gate s...

Страница 36: ...Revision history UM2027 36 37 DocID029048 Rev 1 13 Revision history Table 7 Document revision history Date Revision Changes 09 Mar 2016 1 Initial release...

Страница 37: ...sers are solely responsible for the choice selection and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products No license express or implied to...

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