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參數資料
| 型號： | ST52T301P |
| 廠商： | 意法半導體 |
| 英文描述： | 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER |
| 中文描述： | 8位檢察官辦公室/存儲器DuaLogic]與藝術發(fā)展局和UART，定時器，可控硅控制器 |
| 文件頁數： | 51/100頁 |
| 文件大?。?/td> | 497K |
| 代理商： | ST52T301P |
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with inductive load (i.e. universal or monophase
motors). In the figure 10.8 is shown the relation
between the Phase Angle
α
and the Current flow
angle
γ
.
Theperipheralallowsto controlthe Phase
AngleorequivalentlythetimeT1(seeFigure10.9).
ItispossibletochangeTimeT1settingthecontents
of the peripheral register PERIPH_REG_1. This
value could be directly loaded by using one of the
twofuzzy outputsor byusing a valuecoming from
theRegistersFile,accordingwithINPSLandFZSL
configurationbitsofREG_CONF12(seeTable10.6
and Figure 10.13).
In orderto synchronizethe peripheralwiththe zero
crossing of the main voltage the two pins MAIN1
and MAIN2 must be connected together if
the
externalcircuitistheoneshownintheFigure10.10.
It is possible to use different circuits for the zero
crossing detection, but the MAIN1 signal rising
edge must be synchronized with a main voltage
zero crossing and the MAIN2 signal falling edge
(1.5)
(1)
(0.5)
0
0.5
1
Mains
Voltage
10 mS
20 mSec
T1
T1
Tmax
8 mS
Tr
Tr/2
Ti
Figure10.9 Phase AnglePartialization mode
Figure10.10 PhaseAngle PartializationZeroCrossing
must be synchronized with the following main
voltagezero crossing, always.
Theperipheralcanbeprogrammedinordertowork
with50 or60 Hzmain voltagefrequencybysetting
theREG_CONF10(6)bit, PSF (seeTable 10.4).
Ifmainvoltagefrequencyis equalto 50Hz,thenTr,
see figure 10.9, is equal to 20 mSecand T1 is:
T1 = PERIPH_REG_1(0:7)*(1/25.5)ms.
Thelength of the semiperiodTi/2 is programmable
by using the registers REG_CONF12(0:5) and
REG_CONF13,(seefigure10.12).Byusinga clock
master equal to 20 MHz the pulse width is in the
range from 0.2 to 250
μ
s. The duty cycle of Ti is
always50 %.
In order to avoid problemsfor the Triac firing when
the load is inductive 8 different pulses are
generatedby the peripheral.
If thetimeT1 is bigger thana fixedtime Tmaxthen
nopulsesaregeneratedandtheTriacismaintained
off.This featurewasimplemented in orderto avoid
the firing of the Triac in the second half period of
the main voltage.The firing pulses are generated
when the contents of the PERIPH_REG_1 is less
or equal to 204, otherwisetheyare not generated.
When the frequency of the main voltage is 50 Hz,
T1max is equalto 8 mSec.
It is possibleto generatea programmableinterrupt
in four differentways:
1) no Interrupt;
2) Interrupton the risingedge of the signal MAIN1
3)Interrupton the falling edge of the signal MAIN2
4)Interrupton boththe edgesof the signalMAIN1.
TheInterruptis programmablebyusingtheregister
REG_CONF11(7:6),INTSL
10.4.TRIAC/PWMDRIVERPROGRAMMING
51/99
ST52T301/E301
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