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7
front door plate
Fig.2-9
current-resistant
constructure
oven door
noise filter
follows:
1) Assemble a layer of steel filament or a thin metal plate with many holes at the middle of the window to made it
is possible to observe the heating as well as shielding the microwave.
2) The widely used seal measurement at present
is to assemble a current – resistant construct
between the door and the doorframe. FIG.2-9 is
the typical construction fig of the door. It was
designed according to the theory of
“THETRANSFERING LINE ONE–FOURTHWAVE
LENGTH IMPEDANCE CHANGER”. Although
there is no connecting point from a mechanical
point. It is sealed at the seam from the point of
electricity, so it is called “CURRENT-RESISTANT”.
Recently, with the installation of noise filter in the
current resistant trough, the effect to restrain the
microwave leakage (include high subharmonic)
have been much improved.
3
3
T
T
Y
Y
P
P
I
I
C
C
A
A
L
L
C
C
I
I
R
R
C
C
U
U
I
I
T
T
A
A
N
N
A
A
L
L
Y
Y
A
A
S
S
I
I
S
S
O
O
F
F
M
M
I
I
C
C
R
R
O
O
W
W
A
A
V
V
E
E
O
O
V
V
E
E
N
N
We have introduced the structure and the working principle of the microwave oven previously. We shall analyze
the complete set circuit of the microwave oven link with the practical circuit at this chapter.
Fig.3–1 is the practical circuit diagram of a brand microwave oven. Its corresponding working conditions are as
follows: The door closed, SW1 and SW2 turned on, SW3 closed, power control relay has no power, R1, R2 is cut
off. When cooking, touch the starting switch to power the timer and the power relay. RY1, RY2 closed the power
supply to the anode of the magnetron and the filament, changing the power frequency electric energy to
microwave energy, the microwave energy then transferred to the heating chamber for food heating. At the same
120V
60Hz
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Productinformatie
| Merk | Premium Levella |
| Model | PM7077 |
| Categorie | Magnetron |
| Taal | Nederlands |
| Grootte | 2618 MB |
