摘要:
Disclosed is an electronically commutated DC motor comprising a stator which is provided with at least one stator winding (22, 24, 26), a rotor (28) which electromagnetically interacts therewith, a positive and a negative DC line (76, 78) supplying the motor (20) with current, particularly from a battery (77), a full-bridge circuit (74) which controls the current in the at least one stator winding (22, 24, 26) and is provided with a plurality of bridge branches, each of which comprises an upper bridge transistor (66, 80, 86) controlling the current from the positive DC line (76) to a connection (68; 82; 88) that is assigned to said stator winding (22, 24, 26) and a lower bridge transistor (70, 84, 90) controlling the current from the respective connection of the stator winding to the negative DC line (78). The inventive motor also comprises an arrangement generating a plurality of rotor position signals and an arrangement controlling a given bridge transistor by interlinking rotor position signals that are assigned thereto, said rotor position signals being interlinked by a control transistor (60). A first rotor position signal (H1) can be fed to the base of said control transistor (60) while a second rotor position signal (H2) can be fed to the emitter thereof. The collector signal thereof controls the given bridge transistor (66). Also disclosed is a circuit comprising a half-bridge.
摘要:
A printed circuit board (20) is provided with at least one strip conductor (22) and a contact element (44). The latter is configured in such a way that it can act as a contactor for an electric conductor (66) to ensure connection to the printed circuit board (20).The printed circuit board (20) is provided with continuous recesses in the region of a predefined strip conductor (22). The contact element (44) has a base part (46) and small legs (34,36,38,40,42) which can be pressed into predefined recesses (24-32) of the printed circuit board (20). The contact element is electrically connected to the predefined strip conductor (22) in the region of the base part (46) thereof by means of a soldered connection (74). The contact element (44) has a contact tongue (54) which is springingly coupled to the base part (46) and which is used to act as a contactor for the electric conductor (66). This ensures secure connection of the electric conductor (66) to the printed circuit board e.g. for connection of a device requiring a large amount of current.
摘要:
The invention relates to a method for rotational speed control of a two-pulse electronically switched motor which operates with an auxiliary reluctance torque (fig. 13:MR) and comprises at least one stator winding strand (32), a rotor (38) and a control unit (76) for controlling the motor (30) at a desired rotational speed (nsoll; t s). The inventive method consists in continuously collecting the characteristic value of the rotor (38). Above a determined minimum rotational speed (+NMIN, -NMIN), the operation of the motor (30) is adjusted to an independent value (BW) of a desired rotational speed. Above said minimum rotational speed (+NMIN, -NMIN), the operation of the motor (30) is adjusted to a value (BW) which is a difference function between the desired rotational speed (nsoll; t s) and an actual rotational speed (n; T HALL). A corresponding motor is also disclosed.
摘要:
The invention relates to a method for regulating the rotational speed of a motor, to which a digital governor is assigned and which during operation generates an actual value signal for the rotational speed in the form of a rotational speed frequency signal, to a rotational speed theoretical value which is predetermined in the form of a theoretical value frequency signal. Said method consists of the following steps: in a first time phase, a first numerical frequency value which characterises the rotational speed of the motor is determined from the speed frequency signal; in a second time phase, which is approximately synchronous with the first time phase, a second numerical frequency value which characterises the frequency of the theoretical value frequency signal is determined from the theoretical value frequency signal; The first and second numerical frequency value are used to regulate the rotational speed of the motor in the digital governor to a speed which is assigned to the theoretical frequency signal according to a predetermined mathematical relationship.
摘要:
Disclosed is a polyphase brushless DC motor (20) comprising a permanent-magnet rotor (28), a polyphase stator (22, 24, 26), and a polyphase full-bridge circuit that is assigned to the polyphase stator (22, 24, 26) and is provided with a plurality of bridge branches, each of which is provided with an upper field-effect power transistor (90, 108, 120) that is connected to a positive line (22) and a lower field-effect power transistor (96, 112, 124) that is connected to a negative line (100). Said motor (20) also comprises a rotor position sensor arrangement (30, 32, 34) which generates a plurality of mutually phase-shifted sensor signals (H1, H2, H3) when the motor (20) is in an operating state, the analogous value of said sensor signals (H1, H2, H3) depending on a rotor position-dependent physical variable that acts upon the rotor position sensor arrangement. Signals (54, 56, 58) that are derived from the rotor position sensor arrangement (30, 32, 34) are compared with a periodic sawtooth signal (u70) so as to obtain a plurality of comparative PWM signals (PWM1, PWM2, PWM3), the pulse duty factor of which is a function of the momentary value of the associated sensor signal (H1, H2, H3). The information contained in a comparative PWM signal is supplied to the two power field effect transistors (90, 96; 108, 112; 120, 124) of an associated bridge branch via one respective driver (86, 104, 116) in the form of signals that are in phase opposition in order to trigger said field effect transistors in a hard chopping mode and allow multiquadrant operation of the motor (20).
摘要:
The invention relates to a method for limiting the current in a direct current motor, acting on a full bridge circuit (137) by which means the stator winding configuration (102) of said motor is supplied with a current. When the current limitation responds, the energy supply from the direct current network to the stator winding configuration (102) is interrupted. The stator winding configuration is then operated essentially in short circuit by means of static switches of the full bridge circuit, and the flowing, decaying current is essentially used to continue to drive the motor. When said current reaches a lower value, the energy supply from the direct current network to the motor is reactivated. Preferably, the effective value of the current flowing to the motor is thus reduced when the current limitation responds. The length of time during which said current flows in the form of blocks of current is then increased in a compensatory manner.
摘要:
When a motor is defective, e.g. stops running, runs too slow or overheats, many clients demand that an alarm signal be generated, that is, an alarm device included in the motor. In order to configure said alarm signal, the following method is used: at least one parameter for the configuration of the alarm device of the motor is inputted by means of an input interface (80, 82); the at least one parameter is stored in a parameter storage (74; 109); the execution of at least one routine of the alarm device provided in the microprocessor (23) is influenced by said stored parameter or by parameters derived therefrom. The invention also relates to a motor for implementing said method. Said motor makes it possible to easily configure the alarm device according to the actual requirements of a client.
摘要:
A printed circuit board (20) is provided with at least one strip conductor (22) and a contact element (44). The latter is configured in such a way that it can act as a contactor for an electric conductor (66) to ensure connection to the printed circuit board (20).The printed circuit board (20) is provided with continuous recesses in the region of a predefined strip conductor (22). The contact element (44) has a base part (46) and small legs (34,36,38,40,42) which can be pressed into predefined recesses (24-32) of the printed circuit board (20). The contact element is electrically connected to the predefined strip conductor (22) in the region of the base part (46) thereof by means of a soldered connection (74). The contact element (44) has a contact tongue (54) which is springingly coupled to the base part (46) and which is used to act as a contactor for the electric conductor (66). This ensures secure connection of the electric conductor (66) to the printed circuit board e.g. for connection of a device requiring a large amount of current.
摘要:
Disclosed is an electronically commutated DC motor comprising a stator which is provided with at least one stator winding (22, 24, 26), a rotor (28) which electromagnetically interacts therewith, a positive and a negative DC line (76, 78) supplying the motor (20) with current, particularly from a battery (77), a full-bridge circuit (74) which controls the current in the at least one stator winding (22, 24, 26) and is provided with a plurality of bridge branches, each of which comprises an upper bridge transistor (66, 80, 86) controlling the current from the positive DC line (76) to a connection (68; 82; 88) that is assigned to said stator winding (22, 24, 26) and a lower bridge transistor (70, 84, 90) controlling the current from the respective connection of the stator winding to the negative DC line (78). The inventive motor also comprises an arrangement generating a plurality of rotor position signals and an arrangement controlling a given bridge transistor by interlinking rotor position signals that are assigned thereto, said rotor position signals being interlinked by a control transistor (60). A first rotor position signal (H1) can be fed to the base of said control transistor (60) while a second rotor position signal (H2) can be fed to the emitter thereof. The collector signal thereof controls the given bridge transistor (66). Also disclosed is a circuit comprising a half-bridge.