{"action":"created","issue":{"url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/1","repository_url":"https://api.github.com/repos/pekkaroi/bldc-drive","labels_url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/1/comments","events_url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/1/events","html_url":"https://github.com/pekkaroi/bldc-drive/issues/1","id":156933259,"number":1,"title":"PID error of the project","user":{"login":"lemonhdu","id":16817799,"avatar_url":"https://avatars.githubusercontent.com/u/16817799?v=3","gravatar_id":"","url":"https://api.github.com/users/lemonhdu","html_url":"https://github.com/lemonhdu","followers_url":"https://api.github.com/users/lemonhdu/followers","following_url":"https://api.github.com/users/lemonhdu/following{/other_user}","gists_url":"https://api.github.com/users/lemonhdu/gists{/gist_id}","starred_url":"https://api.github.com/users/lemonhdu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lemonhdu/subscriptions","organizations_url":"https://api.github.com/users/lemonhdu/orgs","repos_url":"https://api.github.com/users/lemonhdu/repos","events_url":"https://api.github.com/users/lemonhdu/events{/privacy}","received_events_url":"https://api.github.com/users/lemonhdu/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":8,"created_at":"2016-05-26T08:43:27Z","updated_at":"2016-06-27T10:49:37Z","closed_at":null,"body":"   Lucky to see this impressive protect, it is with a good framwork. I have tested it in the step mode with an encoder of 4000 PPR. But when I adjust the input signal about 60KHz, that means the speed is under 1000 RPM, the pid error will decrease from 8800 to about 6500, then it will jump bigger and bigger till the biggest pid error.So during this, the sound is also bigger and bigger, why does it happen?\r\nThanks."},"comment":{"url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/comments/228713298","html_url":"https://github.com/pekkaroi/bldc-drive/issues/1#issuecomment-228713298","issue_url":"https://api.github.com/repos/pekkaroi/bldc-drive/issues/1","id":228713298,"user":{"login":"pekkaroi","id":2793858,"avatar_url":"https://avatars.githubusercontent.com/u/2793858?v=3","gravatar_id":"","url":"https://api.github.com/users/pekkaroi","html_url":"https://github.com/pekkaroi","followers_url":"https://api.github.com/users/pekkaroi/followers","following_url":"https://api.github.com/users/pekkaroi/following{/other_user}","gists_url":"https://api.github.com/users/pekkaroi/gists{/gist_id}","starred_url":"https://api.github.com/users/pekkaroi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pekkaroi/subscriptions","organizations_url":"https://api.github.com/users/pekkaroi/orgs","repos_url":"https://api.github.com/users/pekkaroi/repos","events_url":"https://api.github.com/users/pekkaroi/events{/privacy}","received_events_url":"https://api.github.com/users/pekkaroi/received_events","type":"User","site_admin":false},"created_at":"2016-06-27T10:49:37Z","updated_at":"2016-06-27T10:49:37Z","body":"Nice, 3500rpm sounds good. What do you mean by PID rate? The frequency at which the PID loop is run? To some extent it should improve the performance, but there are limits. The PWM frequency is set to ~20kHz, so when PID frequency starts to get close to this value, I think updating the PID more often has no effect at all and possibly even giving some unexpected results."}}
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