Abstract: A curved low impedance laminated bus assembly includes a curved first sheet of relatively thin conductive material forming an AC bus conductor and a curved second sheet of relatively thin conductive material forming a -DC bus conductor directly connected to a -DC line side of a DC energy storage device. A curved third sheet of relatively thin conductive material forms a +DC bus conductor directly connected to a +DC line side of the DC energy storage device and is connected to the AC bus conductor through a +DC switch. A plurality of dielectric sheets are laminated between the AC bus conductor, the -DC bus conductor, and the +DC bus conductor.

Abstract: A resistance arrangement for an electromagnetic switching device (1) is useable for switching capacitive loads with main contact pieces (3) and auxiliary contact pieces (4). One terminal (7) of the auxiliary contact pieces (4) and one terminal (6) of the main contact pieces (3) of the same phase lie on the same side of the switching device (1) stacked on top of each other. The auxiliary contact pieces (4) switch on before the main contact pieces (3) and switch off after them. Between the terminals (6) and (7) of each phase, an ohmic resistance (8) located in a nonconductor housing (13) is connected. The resistance (8) is placed immediately under the terminal (7) of the auxiliary contact piece (4) in the existing cavity (14) of a nonconductor housing (13) expanding into the direction of the terminal (6) of the main contact piece (3). This arrangement can be easily installed and is space-saving.

Abstract: A terminal and capacitor box is provided for mounting directly onto a generally cylindrical surface of an electric induction motor housing. The terminal box includes a generally rectangular body member adapted to receive a pair of capacitors therein. The body member includes a substantially planar deck surface, a first pair of substantially rectangular opposing sidewalls, and a second pair of opposing sidewalls. The second pair of sidewalls have a curved bottom edge preselectively contoured to conform to the curved surface of the electric motor housing. In addition to the above, the terminal box includes a torsional spring member for engaging the pair of capacitors and holding the pair of capacitors in place against the planar deck surface of the rectangular body member and between the sidewalls regardless of the orientation of the terminal box. Thus facilitating the manufacturing process by rendering the box less sensitive to rough handling and more ameanable to processing as a subassembly.

Abstract: A brake time measurement and brake control system measures the brake time of a subassembly, such as an upper die of a press, with the programmable controller already used to control the press. The programmable controller has a selectable time interrupt which causes an interrupt routine inside the programmable controller to be executed at regular time intervals. By varying the duration of the interval, the precision of the brake time measurement may be varied. Also, since the system is implemented with the programmable controller already present on the press, no additional equipment is needed to measure brake time. The brake time monitor and brake control system also implements a top stop control capability with improved precision. The improved precision results from dynamically determining a top stop zone which is appropriately sized given the speed of the die.

Abstract: A circuit interrupter provides a conducting path between two conductors and interrupts the conducting path in response to overcurrent conditions in the conductors. The interrupter includes a magnetic core around which the conductors are disposed. Each conductor is electrically coupled to an arc runner and a spanner is biased into contact with the arc runners to compete a conducting path between the conductors. A secondary response mechanism is provided adjacent to the core and includes arms extending around the core and a magnetic body. In response to overcurrent conditions of a first magnitude the body of the secondary response mechanism is attracted to the core causing the arms to displace the spanner out of contact with the arc runners. In response to overcurrent conditions of a second magnitude, such as due to direct short circuits, the spanner is repelled rapidly to a non-conducting position and the secondary response mechanism is attracted to the core to hold the spanner in the non-conducting position.

Abstract: A device for fastening of electric equipment on an adapter 1 consists of a bearing plate 17 that can be inserted into the adapter 1 and positively locked, and a mounting rail 26 for carrying the electric equipment, with shoe-shaped extensions 27 which can be inserted into the bearing plate 17 and slid into position and locked. The shoe-shaped extensions 27 of the mounting rail 26 engage with the guides 29, 30 of the bearing plate 17. The mounting rail 26 can be slid in the direction of another piece of electric equipment or terminal which is firmly attached, so that the electric terminal parts can be inserted into the terminal clamps of the other equipment. In the operational position, the mounting rail 26 is locked, but can be slid after release of the snap-in locking between the mounting rail 26 and the bearing plate 17. An advantage of this device is that the adapter 1 with the bearing plate 17 can be retrofitted, and that the mounting rail 26 with the equipment can be slid within the bearing plate 17.

Abstract: A controller based network, where data from a plurality of nodes is placed onto the network in a scheduled predetermined order during a network update interval. The data transmitted onto the network being collected following the issuance of a data collection start signal issued in accordance with a timer, whereby the issuance of the data collection start signal can be varied within the network update interval. The collected data being transmitted onto the network upon the issuance of a data transmission signal.

Abstract: A bearing apparatus is provided including an improved end cover. The end cover has a cup element for receipt over the end of a shaft supported by the bearing apparatus. An arm element extends from the cup element and may define a slot for receipt of a suitable threaded member, such as the bearing's lubricant fitting. When the lubricant fitting is tightened, the end cover will be maintained in the desired position on the bearing housing.

Abstract: A method and apparatus for simulating a microprocessor-based system produces simulations which are fast and which are accurate in terms of timing information produced. The source code is first compiled so as to produce a first program for a target microprocessor. Timing information is then extracted from the first program. The source code is compiled so as to produce a second program for a simulation microprocessor. The timing information is inserted into the second program, either directly or indirectly by way of the original source code. The second program thus has the timing information embedded therein and available for use by the simulation microprocessor, such that an output based on the timing information may be generated during the execution of the second program. A simulator which simulates execution of a first program by a target microprocessor comprises a simulation microprocessor and a second program. The second program is derived from a same source code program as the first program.

Abstract: An enclosure for an electrical motor of the explosion proof type, wherein each of the openings for the cable supporting the electrical leads of the motor includes an adapter threadedly received in the opening, and a plug coaxially received in the adapter. The adapter and the plug are retained by means of a C-shaped clamp plate which is releasably fixed directly to the wall of the enclosure and which includes an edge portion which is received in a circumferential groove in the plug. The plug may be solid in cases where it closes the spare lead opening, or it may have an internal passage through which the electrical cable extends.

Abstract: A soft touch switch comprises a switch housing, a first soft touch sensor, and a second soft touch sensor. The switch housing has an outer surface which is curved and an inner surface. The first sensor is disposed inside the switch housing adjacent a first portion of the inner surface, and the second sensor is disposed inside the switch housing adjacent a second portion of the inner surface. The first and second sensors are disposed in different planes inside the switch housing. The soft touch switch is especially suited for industrial applications such as punch presses and has enhanced safety, ergonomic, and freedom of installation features.

Abstract: A matrix converter utilizes a bidirectional lateral insulated gate bipolar transistor (IGBT) including two gate electrodes. The IGBT can conduct in two directions. The matrix converter preferably is a three phase matrix converter including nine bidirectional IGBT switches. The IGBT switches are controlled by a control circuit which includes eighteen control lines, two for each IGBT. Additionally, the bidirectional IGBT can be used in a precharge circuit of a power inverter or in a dynamic brake associated with a motor controller.

Abstract: An apparatus for compensating for turn on delay distortions generated by a PWM controller. When turn on delay compensation is added to a PWM controller command signal and current zero crossings are inaccurately determined, compensation at the zero crossings causes further distortion which is reflected in a d and q-axis current vector frequency. Deviations from an ideal vector frequency are identified and used to modify command voltages to eliminate the zero crossing errors.

Abstract: An industrial controller having a number of addressable I/O modules, employs an I/O map table linking software addresses used for developing the control program to actual physical addresses of the I/O modules on a network. By employing software addresses for connection points to the control process, the program may be developed independent of the topology of the network connecting the processor to the I/O modules and changes in that topology may be made without affecting the control program, but simply by changing the I/O map table. A single change in the I/O map table re-connects an I/O module for all references in the control program.

Abstract: An improved speed reducer having a temperature sensing device electrically connectible to an external monitoring device. The temperature sensing device is supported by the speed reducer housing and extends at least partially into the speed reducer interior area to a predetermined location. The predetermined location is below a minimum lubricant supply level within the speed reducer interior. The temperature sensing device is responsive to the temperature of the lubricant fluid within the speed reducer and is configured to communicate information indicative thereof to an external monitoring device, which may include an alarm or a downstream processing device.

Abstract: A contactor for use in controlling electrical motors may include a mechanical stop engaging the armature of the contactor and having an eyebar receiving one or more shackles of padlocks to prevent closure of the contactor contacts despite the application of an actuation current. An auxiliary switch may disconnect the coil of the contactor when the stop is positioned to lock the contactor providing additional resistance to actuation of the contactor 10.

Abstract: Multiple processing units connected along a communication link to form an industrial controller may arrange for efficient block transfer of data by isochronous methods by forwarding to a data producer a connection message including the desired data structure having the variables necessary to be transmitted in a predefined order. Upon receipt of the data structure, the data producer may program itself to collect the data into the structure and forward the data on a periodic basis dictated by the connection message to the data consumer. Changes in the data structure may thus be accommodated efficiently in a manner that is invisible to the user.

Abstract: A task executed on a multi-tasking industrial controller is employed to monitor data exchanged between a control program (executed as a second task on the industrial controller) and the controlled process. The monitoring task, which may be invoked on a periodic basis, reads designated data, compares it to its last value and if it changes, stores the value in a buffer. A separate program reads this buffer and displays relevant information to the user minimizing degradation in the performance of the control program and eliminating the possibility of corruption of the control program as would be required for the introduction of special memory trapping instructions into the control program.

Abstract: A method to be used with a programmable controller that can communicate with peripheral devices in two protocols, the method for automatically switching controller communication between the two protocols when the protocol used by a peripheral device is different than the protocol currently being used by the controller.