Looking for a motor speed control circuit.

Can anyone please point me to a web page that has the schematic of a speed control circuit with these features ?

1. It should be analog, not microprocessor-based. No tachometer.

1. The motor will be a mains-operated brushed DC type of

1 or 2 hp, with a separate field winding. The load will be fairly constant, but speed should not be greatly affected by mains voltage fluctuations.

1. It doesn't have to be super-precise, but should be somewhat more sophisticated and precise than a typical drill speed control with an SCR plus four or five passive components.

2. It should have a good starting torque as the load will be permanently coupled.

1. Speed control range should be roughly from one-third to two-thirds of the full rated speed.

2. If possible, I'd like to avoid dedicated speed control ICs even if they're analog.

I'll probably be able to adapt a good general design to my particular requirements. I'm not entirely clueless about the theory, but rather long out of touch with practical designing. I have searched with Google, but the two dozen or so results I checked did not have what I need. Thanks in advance for any help.