Saturday, December 18, 2010
Weak current College】 【thyristor's main electrical parameters】.
The main electrical parameters of thyristor has a positive turning point voltage VBO, forward average leakage current IFL, reverse leakage current IRL, repetitive peak off-state voltage VDRM, repetitive peak reverse voltage VRRM, is coming to the average on-State voltage drop VF, average current in IT, the gate trigger voltage VG, gate trigger current IG, gate reverse voltage and maintain current IH, etc.
(A) positive turning point voltage thyristor VBO
Thyristor forward turning point voltage VBO is rated junction temperature of 100 ° c and gate (G) open-circuit condition, in the anode (A) and cathode (K) plus sine half-wave forward voltage, which consists of off-State into on-State voltage corresponding to a peak.
(Ii) thyristor repetitive peak off-state voltage VDRM
Repetitive peak off-state voltage VDRM, refers to blocking the thyristor in forward, allows a plus in A, K (or T1, T2) is the largest peak voltage. This voltage is about subtracting positive turning point voltage 100V voltage value after.
(Iii) thyristor-state average current IT
Average on-State current IT refers to the ambient temperature and standard thermal conditions, thyristor Typ A, K (or T1, T2) interelectrode allowed by current average. (Iv) reverse Breakdown voltage VBR
Reverse Breakdown voltage is rated junction temperature, Thyristors exerted between anode and cathode sine half wave reverse voltage, when its reverse leakage current increases sharply opposed to peak voltage.
(V) thyristor VRRM repetitive peak reverse voltage
Repetitive peak reverse voltage VRRM, refers to the thyristor at gate G circuit breaker, allow adding A, K is among the largest reverse peak voltage. This voltage is approximately reverse Breakdown voltage after subtracting the peak voltage 100V.
(Vi) thyristor is coming to the average voltage drop VF
The average voltage drop VF also known as on-State voltage or average on-State voltage drop VT, refers to the ambient temperature and standard thermal conditions, when the current is passed SCR rated current, the anode and cathode K A voltage drop on average between, typically 0.4 ~ 1.2V.
(VII) SCR gate trigger voltage VGT
Gate trigger VGT, refers to the ambient temperature and the anode and cathode of thyristor to certain values between the forward voltage conditions, enabling SCR from the blocking state transitions for the on-State the required minimum gate DC voltage, usually around 1.5V.
(VIII) SCR gate trigger current IGT
Gate trigger current IGT, refers to the ambient temperature and the anode and cathode of thyristor to certain values between voltage conditions, enabling SCR from blocking state transitions for the on-State the required minimum gate DC current.
(IX) SCR gate reverse voltage
Gate reverse voltage means the SCR gate on the rated voltage is less than 10V.
(10) thyristor maintain current IH
Maintain current IH refers to maintain the minimum thyristor conduction current. When a forward current less than IH, conduction of thyristor will automatically turn off.
(11) thyristor repetitive peak off-state current IDR
Repetitive peak off-state current IDR, refers to the thyristor in off-state of the maximum average leakage current value, typically less than 100 μ A
(XII) thyristor IRRM repetitive peak reverse current
Repetitive peak reverse current IRRM, refers to the thyristor in off-state of reverse maximum leakage current values, generally less than A 100 μ.