Soft start and soft stop open loop control of lights or inductive loads

Foreign high-end drum-type washing machines are driven by single-phase AC commutator motors
  . Figure 7-2 typical application diagram is an example of this. This kind of washing machine requires four
  speeds : washing (w), shaking clothes (D), first dehydration (spinl) and second dehydration
  (spin2). In this example, the four speeds are expressed as the command speed voltage v5 of pin 5, and
  their values ​​are
    Vw=0.7V
    VD=1.13V
    y. . . 1=5 0v
    V, p1.2 =11V
    is used to control the fourth speed, and there are four switches S. , S2n. S3¨ .S. . Table 7 2 shows the status of the four switches at different speeds and   the set voltage y
  for pins 5 and 6 of TDA1085 .
and V, requirements. Kl.6 in the table represents the
  ratio of the speed of dispersing clothes to the speed of washing (expressed as a voltage ratio), that is, K=VD/Vn.